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Glencoe Mathematics Five Minute Check Main Idea Example

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					Five-Minute Check
Main Idea
Example 1: Use the Four-Step Plan
Key Concept: Problem-Solving Strategies
Example 2: Use a Strategy in the Four-Step Plan
• Solve problems using the four-step plan.
             Use the Four-Step Plan

SPENDING A can of soda holds 12 fluid ounces. A
2-liter bottle holds about 67 fluid ounces. If a pack of
six cans costs the same as a 2-liter bottle, which is
the better buy?
Understand What are you trying to find?
                You are trying to find the number of fluid
                ounces of soda in a pack of six cans. This
                number can then be compared to the number
                of fluid ounces in a 2-liter bottle to determine
                which is the better buy.
                What information do you need to solve the
                problem?
                You need to know the number of fluid ounces
                in each can of soda.
           Use the Four-Step Plan

Plan      You can find the number of fluid ounces of
          soda in a pack of six cans by multiplying the
          number of fluid ounces in one can by six.
Solve     12 × 6 = 72
          There are 72 fluid ounces of soda in a pack
          of six cans. The number of fluid ounces of
          soda in a 2-liter bottle is about 67. Therefore,
          the pack of six cans is the better buy
          because you get more soda for the same
          price.

Answer: The pack of six cans is the better buy.
         Use the Four-Step Plan

Check   Is your answer reasonable?
        The answer makes sense based on the facts
        given in the problem.
FIELD TRIP The sixth grade class at Meadow Middle
School is taking a field trip to the local zoo. There will
be 142 students plus 12 adults going on the trip. If
each school bus can hold 48 people, how many
buses will be needed for the field trip?

A. 3 buses
B. 4 buses
C. 5 buses                                       1.
                                                 2.
                                                      A
                                                      B
                                                 3.   C
D. 6 buses                                       4.   D

                             0%   0%   0%   0%
                         A




                                  B




                                       C




                                            D
           Use a Strategy in the Four-Step Plan

POPULATION For every 100,000 people in the
United States, there are 5,750 radios. For every
100,000 people in Canada, there are 323 radios.
Suppose Sheamus lives in Des Moines, Iowa and
Alex lives in Windsor, Ontario. Both cities have
about 200,000 residents. About how many more
radios are there in Sheamus’s city than in Alex’s
city?
Understand     You know the approximate number of
               radios per 100,000 people in both
               Sheamus’s city and Alex’s city.
          Use a Strategy in the Four-Step Plan

Plan     You can find the approximate number of
         radios in each city by multiplying the estimate
         per 100,000 people by two to get an estimate
         per 200,000 people. Then, subtract to find how
         many more radios there are in Des Moines
         than in Windsor.
Solve    Des Moines: 5,750  2 = 11,500
         Windsor: 323  2 = 646
         11,500 – 646 = 10,854
Answer: So, Des Moines has about 10,854 more
        radios than Windsor has.
         Use a Strategy in the Four-Step Plan

Check   Based on the information given in the problem,
        the answer seems to be reasonable.
READING Ben borrows a 500-page book from the
library. On the first day, he reads 24 pages. On the
second day, he reads 39 pages and on the third day
he reads 54 pages. If Ben follows the same pattern
of number of pages read for seven days, will he
have finished the book at the end of the week?
A. No, he will have only
   read 483 pages.
B. No, he will have only                             1.        A
                                                     2.        B
   read 492 pages.                                   3.        C
                                                     4.        D
C. yes                                 0%   0%   0%       0%



                                   A




                                            B




                                                 C




                                                          D
D. not enough information
   given
End of the Lesson
Five-Minute Check

Image Bank

Math Tools




Arithmetic Sequences

Modeling Algebraic Expressions

Function Machines
Find 5,678 – 3,479.

A. 1,299


B. 1,929


C. 2,199                            1.        A
                                    2.        B
                                    3.        C
                          0%   0%   4.
                                         0%   D
                                                  0%
D. 2,919
                      A




                               B




                                         C




                                                  D
Find 29,811 ÷ 57.

A. 523


B. 513


C. 503                            1.        A
                                  2.        B
                                  3.        C
                        0%   0%   4.
                                       0%   D
                                                0%

D. 493
                    A




                             B




                                       C




                                                D
Each classroom in a school has 30 student desks.
If the average class size is 25 students, and there
are 55 classrooms occupied by classes, about how
many unused desks are there?

A. 300

B. 275
                                              1.   A
                                              2.   B
                                              3.   C
C. 250                                        4.   D
                          0%   0%   0%   0%

D. 225
                      A




                               B




                                    C




                                         D
Katrina’s family wants to order
Chinese food for dinner. Using the
table, write and solve an equation
to find how much money Katrina’s
family needs to pay for their order.

A.   8($2.95 + $4.95 + $5.95 + $1.89) = x;
     x = $125.92
B.   2($2.95 + $4.95 + $5.95 + $1.89) = x;            1.    A
     x = $28.42                                       2.    B

C.   (2 × $2.95) + $4.95 + (2 × $5.95) +              3.    C
                                                      4.    D
     (3 × $1.89) = x; x = $28.42                 0%   0%   0%   0%

D.   $2.95 + $4.95 + $5.95 + $1.89 = x;


                                             A




                                                      B




                                                           C




                                                                D
     x = $15.74
Katrina’s family wants to order
Chinese food for dinner. How much
change should Katrina’s father
receive if he pays for the Chinese
food with a fifty-dollar bill?

A.   $21.58

B.   $21.82                                     1.   A
                                                2.   B
                                                3.   C
C.   $25.18                                     4.   D

                            0%   0%   0%   0%
D.   $28.42
                        A




                                 B




                                      C




                                           D
A. 55%


B. 65%

                       1.        A
C. 75%                 2.        B
                       3.        C
             0%   0%   4.
                            0%   D
                                     0%

D. 85%
         A




                  B




                            C




                                     D

				
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