7th Grade Mental Math

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7th Grade Mental Math Powered By Docstoc
					MM 7-1                                      MM 7-3

1. What is 3 hours after noon? (3 p.m.)     1. What is 5 hours before midnight? (7
                                               p.m.)
2. What is 376 + 5? (381)
                                            2. What is 400 – 35? (365)
3. Estimate 43 x 57. (2,400)
                                            3. Estimate 290 x 58. (365)
4. What is 16/20 in simplest form? (4/5)
                                            4. What is 20/4 in simplest form? (5)
             2
5. What is 2 ? (4)
                                            5. What is 32 ? (9)




MM 7-2                                      MM 7-4

1. What is 30 minutes after 4:45? (5:15)    1. What is 15 minutes after 4:35? (4:50)

2. What is 410 + 135? (545)                 2. What is 239 + 8? (247)

3. Estimate 37 x 82. (3,200)                3. Estimate 113 x 310. (30,000)

4. What is 14/5 in simplest form? (2 4/5)   4. What is 12/24 in simplest form? (1/2)

5. What is 33 ? (27)                        5. What is 52 ? (25)
MM 7-5                                     MM 7-7

1. What is 1 hour and 10 minutes after     1. What is 7 minus 5 tenths? (6.5)
   4:00? (5:10)
                                           2. What is 35 + 75? (110)
2. What is 16 + 45? (61)
                                           3. What times 7 equals 63? (9)
3. Estimate 9 x 97. (900)
                                           4. Round 476 to the nearest 10. (480)
4. What is 15/18 in simplest form? (5/6)
                                           5. What is 1,600 ÷ 40? (40)
            3
5. What is 4 ? (64)




MM 7-6                                     MM 7-8
1. What is 6 minus 4 tenths? (5.6)         1. Write 106 and 45 thousands. (106.045)
2. What is 60 + 70? (130)                  2. What is 40 + 17? (57)
3. What times 10 equals 200? (20)          3. What times 6 equals 54? (9)
4. Round 543 to the nearest 100. (500)     4. Round 168 to the nearest 10. (170)

5. What is 2,000 50? (40)                 5. What is 3,000 ÷ 6? (500)
MM 7-9                                         MM 7-11

1. What is 6 minus 4 hundredths? (5.96)        1. What is 5 minus 3 tenths? (4.7)

2. What is 80 + 50? (130)                      2. What is 140 + 55? (195)

3. What times 100 equals 1,000? (10)           3. What times 8 equals 32? (4)

4. Round 632 to the nearest 10. (630)          4. Round 799 to the nearest 100. (800)

5. What is 1,200 ÷ 30? (40)                    5. What is 500 x 50? (25,000)




MM 7-10                                        MM 7-12

1. What is 3 tenths times 7? (2.1)             1. What is 4 hundredths times 5? (.2)

2. How many dimes are in $4.00? (40)           2. How many quarters in $6.00? (24)

3. What do you call the answer when you        3. What do you call the answer when you
   add two numbers? (sum)                         divide two numbers? (quotient)

4. What is 1,500 ÷ 50? (30)                    4. What is 360 ÷ 4? (90)


5. Write 6 _ as an improper fraction. (27/4)   5. Write 6 4/5 as an improper fraction.
                                                  (34/5)
MM 7-13                                         MM 7-15

1. What is 6 tenths times 2? (1.2)              1. What is 3 tenths times 3? (.9)

2. How many nickels in $3.00? (60)              2. How many nickels in $6? (120)

3. What do you call the answer when you         3. What is 65 – 40? (25)
   subtract two numbers? (difference)
                                                4. What is 200 x 60? (12,000)
4. What is 400 x 9? (3,600)
                                                5. Write 6 _ as an improper fraction. (13/2)
5. Write 1 2/3 as an improper fraction. (5/3)




MM 7-14                                         MM 7-16

1. What is 5 hundredths times 10? (.5)          1. What is 5 tenths x 7 tenths? (.35)

2. How many dimes in $10? (100)                 2. What is _ of 24? (6)

3. What is 130 – 80? (50)                       3. What is 350 – 75? (275)

4. What is 3,500 ÷ 5? (700)                     4. What is 7 + 12 + 5? (24)

5. Write 1 2/9 as an improper fraction.         5. How many candies in 3 1/3 dozen? (40)
   (11/9)
MM 7 – 17                                   MM 7-19

1. What is 6 hundredths times 3             1. What is 7 tenths times 4 tenths? (.28)
   hundredths? (.0018)
                                            2. What is _ of 17? (8 _)
2. What is _ of 26? (13)
                                            3. What is 720 – 110? (610)
3. What is 65 – 30? (35)
                                            4. What is 15 + 7 + 6? (28)
4. What is 9 + 3 + 8? (20)
                                            5. How many eggs in 5 dozen? (60)
5. How many eggs in 3 dozen? (36)




MM 7-18                                     MM 7-20

1. What is 3 tenths times 6 tenths? (.18)   1. What is 7 hundredths times 4
                                               hundredths? (.0028)
2. What is _ of 48? (24)
                                            2. What is 1/3 of 18? (6)
3. What is 5,000 – 500? (4,500)
                                            3. What is 600 – 140? (460)
4. What is 7 + 9 – 4? (12)
                                            4. What is 6 + 9 + 4 – 2? (17)
5. How many cookies in 4 _ dozen? (54)
                                            5. How many cookies in 10 dozen? (120)
MM 7-21                                     MM 7-23

1. What is 3/9 in simplest terms? (1/3)     1. What is _ of 20? (15)

2. What is the decimal for _? (.25)         2. 6 meters equal how many centimeters?
                                               (600)
3. What is $4.10 times 2? ($8.20)
                                            3. How many 1/3’s in 2 1/3? (7)
4. 60 x 80 = (4,800).
                                            4. 300 ÷ 6 equals (50).
5. What is _ of $2? ($.50)
                                            5. What is 4 – 1 _? (2 _)




MM 7-22                                     MM 7-24
1. 8 oz. is what fraction of pound in       1. What percent of 60 is 30? (50%)
   simplest form? (1/2)
                                            2. What is 6 times 4 ÷ 3? (8)
2. _ of 16 = (12).

3. What is 540 + 8? (548)                   3. Round 365 thousandths to hundredths.
                                               (.37)
4. One minute 30 seconds equals how many
   seconds? (90)                            4. 40 x 120 = (4,800).

5. If 6 apples cost $.60 how much would 3   5. What is 12 hundredths ÷ 2? (.06)
   cost? ($0.30)
MM 7-25                                       MM 7-27

1. Joe had 60 stamps. He got 50 more from     1. How many inches in 2 yards 4 inches?
   his uncle and 40 more from his aunt.          (76)
   How many does he now have? (150)
                                              2. 6 x 9 x 2 = (108).
2. _ of 24 is (18).
                                              3. 630 – 40 = (590).
3. 6 oz. equals what fraction of a pound in
   simplest form? (3/8)                       4. What percent of 20 is 15? (75%)

4. What is _ of 1/8? (1/16)                   5. 120 ÷ 4 = (30).

5. Candy costs 2 cents a piece. How many
   pieces can you buy for 60 cents? (30)




MM 7-26                                       MM 7-28
1. What is 16/32 in lowest terms? (1/2)       1. _ of 6 _ = (3 _).

2. 600 ÷ 4 = (150).                           2. 6 x 2 x 5 = (60).

3. 3 times 4 times 3 = (36).                  3. How many 1/5’s in 5 2/5? (27)

4. What is the decimal for _? (.25)           4. 150 ÷ 5 = (30).

5. What is 120 – 40? (80)                     5. 1/6 of 180 = (30).
MM 7-29                                    MM 7-31

1. What is 8/54 in simplest form? (4/27)   1. Sue has 12 horses. She sold _ of them.
                                              How many horses does she have now?
2. What is the decimal for 6/10? (.6)         (3)

3. 540 ÷ 2 = (270).                        2. What is 1/5 of 35? (7)

4. 6 meters equals how many centimeters?   3. What is 13 – 2 _? (10 _)
   (600)
                                           4. What percent of 120 is 40? (33%)
5. What is _ of 21? (10 _)
                                           5. What is 2/3 of 12? (8)




MM 7-30                                    MM 7-32

1. 548 + 8 = (556).                        1. What is 1.10 x 4? (4.40)

2. 125 x 2 = (250).                        2. What is the decimal for 1/5? (.20)

3. How many 1/6 are in 2? (12)             3. What is 4 _ - 2 _? (2 _)

4. What is 4,200 ÷ 2? (2,100)              4. What is 18/24 in simplest form? (3/4)

                                           5. 120 x 20 = (2,400).
5. 6 x 20 + 8 = (128).
MM 7-33                                        MM 7-35

1. What is the decimal for 4/5? (.8)           1. Round .138 to the nearest hundredth.
                                                  (.14)
2. 660 ÷ 3 = (220).
                                               2. 2/5 of 100 = (40).
3. What is 180 x 3? (540)
                                               3. 90 x 3 + 30 = (300).
4. What is 6 x 10 ÷ 2? (30)
                                               4. What is $1.30 x 4? ($5.20)
5. What percent of 140 is 14? (10%)            5. What is the decimal for 3/5? (.6)



                                               Mm 7-36
MM 7-34
                                               1. What is 18/54 in simplest terms? (1/3)
1. 4 oz. is what fractional part of a pound?
   (1/4)                                       2. Round 67 hundredths to the nearest tenth.
                                                  (.7)
2. 1/6 of 60 = (10).
                                               3. _ of 48 = (12).
3. What is 145 + 13? (158)
                                               4. 63 x 2 = (126).
4. What is _ of 80? (20)
                                               5. What is 2 x 12 x 2? (48)
5. What is 5 x 11 + 13? (68)
MM 7-37                                      MM 7-39

1. 8 oranges cost $1.20. How much would      1. How many 1/8ths in 8? (64)
   12 cost? ($1.80)
                                             2. 66 + 66 = (132).
2. What is 339 + 8? (347)
                                             3. If 12 pears cost $1.20, how much would
3. What is 6 x 8 minus 4 x 2? (40)              18 cost? ($1.80)

4. _ of 120 = (90).                          4. What is 62 x 2? (124)

5. What is 9 – 2 _? (6 _).                   5. 5 x 20 ÷ 4 = (25).




MM 7-38                                      MM 7-40
1. What is the decimal for 5/100ths? (.05)   1. What is 62 hundredths ÷ 2? (.31)
2. What is 91 ÷ 7? (13)
                                             2. 15 meters equal how many centimeters?
                                                (1,500)
3. What is 640 ÷ 4? (160)
                                             3. What is 3 – 1/3? (2 2/3)
4. 32 oz. is how many lbs? (2)
                                             4. How many 1/7ths in 10? (70)
5. What is _ of 92? (46)
                                             5. 15 x 4 ÷ 4 = (15).
MM 7-41                                        MM 7-43

1. What is 2/3 of 66? (44)                     1. Children’s tickets sell for $3. Adult
                                                  tickets sell for $6. How much would 3
2. 62 = (36).                                     adult tickets and 3 children’s tickets
                                                  cost? ($27)
3. What is your change from $45 if your
   purchase is $15.50? ($29.50)                2. 60 ÷ 3 = (20).

4. What is the perimeter of a square with a    3. A $20 shirt is reduced by 50%. What is
   side of 6 cm? (24 centimeters)                 the new price? ($10)
5. 60 x 120 = (7,200).                         4. Write thirty-seven and forty-eight
                                                  thousandths. (37.048)

                                               5. Write the formula for the area of a
                                                  square. (4 x side)




MM 7-42                                        MM 7-44
1. An increase from 16 to 24 is what           1. John has a collection of quarters.
   percent increase? (50%)                        Altogether he has $12.50. How many
                                                  quarters does he have? (50)
2. Write an expression for 6 more than 4
   times a number. (4 x n + 6)                 2. What number is halfway between 80 and
                                                  50? (65)
3. A triangle has a 45 degree angle and a 60
   degree angle. What is the missing angle?    3. 43 = (64).
   (75 degrees)
                                               4. If 12 pencils cost $2.40, how much do 6
4. Write the fraction for 25%. (1/4)              cost? ($1.20)

                                               5. What is 1/5 of $1.20? ($0.24)
MM 7-45                                       MM 7-47

1. 33 = (27).                                 1. Six loaves of bread cost 30 cents a loaf. 3
                                                 pounds of butter cost 40 cents a pound.
2. What is your change from a $50 bill if        What is the total cost? ($3.00)
   your purchase is $30.50? ($19.50)
                                              2. 550 ÷ 5 = (110).
3. What is the perimeter of a square with a
   side of 6 _ feet? (26 feet)                3. A $24 dress is reduced 25%. What is the
                                                 new price? ($18)
4. 30 x 30 = (900).
                                              4. Write this number. Sixty-six and twenty-
5. 6 tenths plus 38 hundredths = (.98).          three thousandths. (66.023)

                                              5. Write the formula for the area of a
                                                 triangle. (1/2 bh)




MM 7-46                                       MM 7-48
1. 625 + 9 = (634).                           1. Joe has a collection of dimes. Altogether
                                                 he has $4.40. How many dimes does he
2. An increase from 4 to 12 is what percent      have? (44)
   increase? (200%)
                                              2. What number is halfway between 99 and
3. Write an expression for 2 more than 8         33? (66)
   times a number. (8 x n + 2).
                                              3. 72 = (49).
4. A triangle has a 15 degree angle and a
   100 degree angle. What is the              4. If 6 pads of paper cost $6.60, how much
   measurement of the third angle? (65           do 12 cost? ($13.20)
   degrees)
                                              5. What is 1/6 of $6? ($1)
5. Write the fraction for 55% in lowest
   terms. (11/20).
MM 7-49                                        MM 7-51

1. What is the change from $10 if your         1. 600 ÷ 5 = (120).
   purchase is $3.30? ($6.70)
                                               2. A $30 shirt is reduced by 50%. What is
2. What is the perimeter of a square with a       the new price? ($15)
   side of 15 ft.? (60 ft.)
                                               3. Write this number. Thirty-five and thirty-
3. 25 x 5 = (125).                                five thousandths. (35.035)
4. 6 hundredths plus 24 thousandths =          4. Write the area formula for a triangle. (1/2
   (.084).                                        bh)
5. 987 + 13 = (1,000).                         5. Robbie has a collection of 50 cent pieces.
                                                  He has saved $15 worth. How many 50
                                                  cent pieces does he have? (30)




MM 7-50                                        MM 7-52
1. An increase from 20 to 25 is what           1. What number is halfway between 50 and
   percent increase? (25%)                        150? (100)
2. Write an expression for 7 more than 10      2. 92 = (81).
   times a number? (10 x n + 7)
                                               3. If lettuce costs 55 cents a head, how
3. A triangle has a 15 degree angle and a 20      much do 7 heads cost? ($3.85)
   degree angle. What is the measurement
   of the missing angle? (145 degrees)         4. What is 2/3 of 75? (50)
4. Write the fraction for 25%. (1/4)           5. 53 = (125).
5. Cats sell for $15 each. How much does it
   cost for 6 cats? ($90)
MM 7-53                                        MM 7-55

1. What is the change from a $50 bill if you   1. 550 ÷ 5 = (110).
   make a purchase costing $19? ($31)
                                               2. A $40 pair of pants is reduced by 20%.
2. What is the perimeter of a rectangular         What is the new price? ($32)
   house with a length of 50 feet and a
   width of 35 feet? (170 ft.)                 3. Write this number. Two hundred two and
                                                  two-hundred two thousandths. (202.202)
3. 90 x 90 = (8,100).
                                               4. 34 = (81).
4. 9 tenths plus 38 hundredths = (1.28).
                                               5. What is the cost of 15 packs of gum that
5. 673 + 9 = (682).                               sell for 20 cents each? ($3)




MM 7-54                                        MM 7-56
1. An increase from 60 to 90 is what           1. What is 1/8 of 64? (8)
   percent increase? (50%)
                                               2. 82 = (64).
2. Write an expression for 8 more than 6
   times a number. (6 x n + 8)                 3. What is the change from a $5 bill if your
                                                  purchase was $3.30? ($1.70)
3. A triangle has a 25 degree angle and a 50
   degree angle. What is the measurement       4. What is the area of a square with a side
   of the third angle? (105 degrees)              of 12 yards? (144 sq. yards)
4. Write the fraction for 40% in simplest      5. 120 x 30 = (3,600).
   form. (2/5)

5. Bananas sell for 60 cents each. Oranges
   sell for 50 cents each. What is the total
   cost for two of each? ($2.20)
MM 7-57                                        MM 7-59

1. 6 hundredths plus 6 thousandths = (.066).   1. 280 – 71 = (209).

2. 848 + 6 = (854).                            2. A $36 blouse is reduced by 25%. What is
                                                  the new price? ($27)
3. An increase from 20 to 50 is what %
   increase? (150%)                            3. An increase from 40 t0 60 is what
                                                  percent increase? (50%)
4. Write the expression for 4 more than 4
   times a number. (4 x n + 4)                 4. What is the change from $35 if your
                                                  purchase is $13.50? ($21.50)
5. A triangle has a 50 degree angle and a 45
   degree angle. What is the measurement       5. 60 x 20 = (1,200).
   of the third angle? (85 degrees)



Mm 7-58                                        MM 7-60

1. Write an expression for 3 times a number    1. What is the area of a rectangle that has a
   plus 5. (3 x n + 5)                            length of 8 inches and a width of 4
                                                  inches? (32 sq. inches)
2. Write a fraction for 90% in lowest terms.
   (9/10)                                      2. Write a fraction for 70% in lowest terms.
                                                  (7/10)
3. A triangle has a 55 degree angle and a 25
   degree angle. What is the measurement       3. What number is halfway between 70 and
   of the third angle? (100 degrees)              90? (80)

4. 770 ÷ 70 = (11).                            4. An increase from 10 to 40 is what
                                                  percent increase? (300%)
5. Write this number. Nine and thirty nine
   thousandths. (9.039)                        5. 645 + 15 = (660).
MM 7-61                                           MM 7-63

1. Write 4/5 as a decimal. (.8)                   1. What is _ of 80? (60)

2. 90 x 80 = (7,200).                             2. At 50 cents a lb., how much would 5 lbs.
                                                     of pears cost? ($2.50)
3. Find the area of a square with a 7 ft. side.
   (49 sq. ft.)                                   3. What is the interest for one year at 10%
                                                     on $1,500? ($150)
4. 640 ÷ 4 = (160).
                                                  4. How many meters in 580 cm? (5.8)
5. 8 tenths plus 85 hundredths = (1.65).
                                                  5. +8 - -4? (12)




MM 7-62                                           MM 7-64

1. What is 20% of 100? (20)                       1. What is 60% of 80? (48)

2. What is 5 _ - 2 _? (3 _)                       2. Noell needed a string 20 ft. long. She
                                                     found one 6 ft. long. How much more did
3. What is the supplement of a 60 degree             she need? (14 ft.)
   angle? (120)
                                                  3. What is 122 ? (144)
4. +4 + -10 = (-6).
                                                  4. What is the perimeter of a square 15 ft.
5. Estimate 82 x 41. (3,200)                         long? (60 ft.)

                                                  5. What is the square root of 144? (12)
MM 7-65                                        MM 7-67

1. What is half of 16 and 6 hundredths?        1. What is _ of 120? (30)
   (8.03)
                                               2. At 21 cents a lb., how much would 4 lbs.
2. What is 480 ÷ 8? (60)                          of candy cost? (84 cents)

3. If 8 oz. of soap costs 80 cents, how much   3. What is the interest for one year at 10%
   would 1 lb. cost? ($1.60)                      on $2,200? ($220)

4. What is 1% of 60? (.6)                      4. How many meters in 440 cm? (4.4)

5. Karleen had 6 quarters, 6 dimes and 6       5. +3 - -5 = (8).
   nickels. She spent 40 cents. How much
   does she have left? ($2.00)




MM 7-66                                        MM 7-68

1. What is 20% of 50? (10)                     1. What is 50% of 90? (45)

2. What is 6 2/3 – 2 1/6? (4 3/6 or 4 _)       2. 24 = (16).

3. What is the supplement of an 85 degree      3. What is the perimeter of a square which
   angle? (95 degrees)                            is 6 _ ft. on one side? (26 ft.)

4. +3 + -3 = (0).                              4. What is _ of twelve and four hundredths?
                                                  (3.01)
5. Estimate 61 x 42. (2,400)
                                               5. What is 150% of 60? (90)
MM 7-69                                       MM 7-71

1. What is 5% of 680? (34)                    1. What is 30% of 200? (60)

2. +6 - -2 = (8).                             2. What is 25 ? (32)

3. How many meters is 680 cm? (6.8)           3. What is 96 ÷ 3? (32)

4. Estimate 89 x 48. (4,500)                  4. If 4 oz. of nuts cost 60 cents, how much
                                                 would one pound cost? ($2.40)
5. What is 20% of 600? (120)
                                              5. +8 - -4 = (4).




MM 7-70                                       MM 7-72
1. Frank had 4 quarters, 4 dimes and 4        1. What is 3/5 of 25? (15)
   nickels. He spent 50 cents. How much
   does he have left? ($1.10)                 2. Estimate 89 x 71. (6,300)
2. What is the supplement of a 50 degree      3. What is 60% of 600? (360)
   angle? (130 degrees)
                                              4. What is the interest for one year at 5% on
3. What is 6 2/3 – 2 1/3? (4 1/3)                $2,000? ($100)
4. At 56 cents a lb., how much would 5 lbs.   5. What is 2 _ times 8? (20)
   of potatoes cost? ($2.80)

5. Estimate 21 x 30. (600)
MM 7-73                                            MM 7-75

1. Jill cut a piece of material that was 6 ft. 4   1. Estimate 22 x 31. (600)
   in. long into two pieces. One was 4 ft. 2
   in. long. How long was the other piece?         2. +6 + -2 = (4).
   (2 ft. 2 in.)
                                                   3. At 42 cents a lb. how much would 6 lbs.
2. What is the square root of 121? (11)               of grapes cost? ($2.52)

3. What is 3 1/3 times 9? (30)                     4. What is 50% of 400? (200)

4. What is 120 ÷ 6? (20)                           5. What is 140 ÷ 5? (28)

5. What is 2,400 – 1,500? (900)




MM 7-74                                            MM 7-76

1. What is the interest for one year at 9% on      1. What is _ of 200? (150)
   $3,000? (270)
                                                   2. What is 90% of 400? (360)
2. What is 60% of 4,000? (2,400)
                                                   3. What is 6 7/8 – 4 1/8? (2 6/8 or 2 _)
3. What is 6 x 8 – 4 + 6? (50)
                                                   4. What is 126 ÷ 6? (21)
4. What is 3 – 2/3? (2 1/3)
                                                   5. +5 - -2 = (7).
5. How many meters in 380 cm? (3.8)
MM 7-77                                       MM 7-79

1. What is the interest for 1 year at 8% on   1. What is 150% of 50? (75)
   $5,000? ($400)
                                              2. What is 16 – 3 _? (12 _)
2. What is 35% of 300? (105)
                                              3. What is the complement of a 30 degree
3. What is 84 ÷ 4? (21)                          angle? (60 degrees)

4. -6 + +2 = (-4).                            4. -8 + -15 = (-23).

5. What is 230 – 170? (60)                    5. Estimate 23 x 72. (1,400)




MM 7-78                                       MM 7-80

1. What is 50% of 460? (230)                  1. What is 75% of 400? (300)

2. What is 4 – 1 1/3? (2 2/3)                 2. What is 3 _ - 2 _? (1 _)

3. What is the supplement of a 35 degree      3. What is the supplement of a 40 degree
   angle? (145 degrees)                          angle? (140 degrees)

4. +8 + -12 = (-4).                           4. +16 - +7 = (9)

5. Estimate 37 x 54. (2,000)                  5. Estimate 147  5. (30)
MM 7-81                                    MM 7-83

1. What is 25% of 16? (4)                  1. What is 150% of 80? (120)

2. What is 4 _ - 1 _? (3)                  2. What is 70 x 60? (4,200)

3. What is the complement of a 25 degree   3. What is 2 _ times 16? (36)
   angle? (65 degrees)
                                           4. Estimate 799  20. (40)
4. -6 - -3 = (-3).
                                           5. 2.5 + 1.5 = (4).
5. Estimate 17 x 62. (1,200)




MM 7-82                                    MM 7-84
1. What is 1% of 500? (5)                  1. What is 360 + 480? (840)
2. What is 4 1/3 + 6 2/3? (11)             2. What is the area of a rectangle 14 m long
                                              and 6 m wide? (64 sq m)
3. What is the supplement of a 90 degree
   angle? (90 degrees)                     3. What is 2% of 140? (2.8)
4. -16 - -7 = (-9).                        4. Estimate 83.5 x 16. (1,600)
5. Estimate 63 x 28. (1,800)               5. Write the number that is 4 tenths more
                                              than 15 and 7 tenths. (16.1)