Multiplying & Dividing Decimals by 773ElO84

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									      Today we will review
“Multiplying & Dividing Decimals”




              CONFIDENTIAL          1
 Multiplying Decimals by Whole
            Numbers
1) Multiply 0.65 x 6




               CONFIDENTIAL      2
 Multiplying Decimals by Whole
            Numbers
2) Multiply 9 x 0.0036




               CONFIDENTIAL      3
 Multiplying Decimals by Whole
            Numbers
3) Multiply 0.0198 x 2




               CONFIDENTIAL      4
 Multiplying Decimals by Whole
            Numbers
4) Ernesto bought 7 spiral
notebooks. Each notebook cost
$2.29, including tax. What was the
total cost of the notebooks?




               CONFIDENTIAL          5
 Multiplying Decimals by Whole
            Numbers
5) Before sales tax, what is the total
cost of three CDs selling for $13.98
each?




                CONFIDENTIAL             6
Multiplying Decimals by Decimals
6)Multiply 27.43 x 1.089




               CONFIDENTIAL        7
Multiplying Decimals by Decimals
7) Multiply 0.45 x 0.053




               CONFIDENTIAL        8
Multiplying Decimals by Decimals
8) Multiply 0.45 x 0.05




               CONFIDENTIAL        9
Multiplying Decimals by Decimals
9) A steamboat travels 36.5 miles
each day. How far will it travel in 6.5
days?




                CONFIDENTIAL          10
Multiplying Decimals by Decimals
10) Juan is buying a video game that
costs $32.99. The sales tax is found
by multiplying the cost of the video
game by 0.06. What is the cost of
the sales tax for the video game?




               CONFIDENTIAL        11
   Dividing Decimals by Whole
            Numbers
11) Divide. Round to the nearest tenth if
necessary.


           19 11.4




                 CONFIDENTIAL               12
   Dividing Decimals by Whole
            Numbers
12) Divide. Round to the nearest tenth if
necessary.


           6 232.22




                 CONFIDENTIAL               13
   Dividing Decimals by Whole
            Numbers
13) Divide. Round to the nearest tenth if
necessary.


           7 48.68




                 CONFIDENTIAL               14
   Dividing Decimals by Whole
            Numbers
14) Four girls of a track team ran the 4-
by-100 meter relay in a total of 46.8
seconds. What was the average time for
each runner?




                  CONFIDENTIAL              15
   Dividing Decimals by Whole
            Numbers
15) Tyler’s father has budgeted $64.50
for his three children’s monthly allowance.
Assuming they each earn the same
amount, how much allowance will Tyler
receive?




                  CONFIDENTIAL            16
Dividing Decimals by Decimals
16) Divide.


              0.42 96.6




                   CONFIDENTIAL   17
Dividing Decimals by Decimals
17) Divide.


          1.3 0.0338




               CONFIDENTIAL     18
Dividing Decimals by Decimals
18) Divide.


              3.4 0.16728




                    CONFIDENTIAL   19
Dividing Decimals by Decimals
19) A flower garden is 11.25 meters long.
Mrs. Owens wants to make a border along
one side using bricks that are 0.25 meter
long. How many bricks does she need?




                 CONFIDENTIAL           20
Dividing Decimals by Decimals
20) If a board 7.5 feet long is cut into 2.5
foot-pieces, how many pieces will there
be?




                  CONFIDENTIAL                 21
           Concept Check
21) Choose the correct term or number to
complete each sentence.
    When (multiplying, dividing) two decimals, count the
    number of decimal places in each factor to
    determine the number of decimal places in the
    answer.




                      CONFIDENTIAL                     22
           Concept Check
22) Choose the correct term or number to
complete each sentence.
    To check your answer for a division problem, you
    can multiply the quotient by the (dividend, divisor).




                       CONFIDENTIAL                         23
           Concept Check
23) Choose the correct term or number to
complete each sentence.
    To change the divisor into a whole number, multiply
    both the divisor and the dividend by the same power
    of (10, 100)




                      CONFIDENTIAL                    24
           Concept Check
24) Choose the correct term or number to
complete each sentence.
    When dividing decimal by a whole number, place the
    decimal point in the quotient directly (below, above)
    the decimal point found in the dividend.




                      CONFIDENTIAL                      25
          More Practice
25) You can drive your car 19.56 miles
with one gallon of gasoline. How many
miles can you drive with 11.86 gallons of
gasoline?




                 CONFIDENTIAL               26
          More Practice
26) Ron paid $6.72 for 40 sheets of
stickers. What was the average price of
each sheet of stickers rounded to the
nearest cent?




                 CONFIDENTIAL             27
          More Practice
27) Impulses in the human nervous
system travel at a rate of 188 miles per
hour. Find the speed in miles per minute.
Round to the nearest hundredth.




                 CONFIDENTIAL               28
          More Practice
28) The streets on Trevor’s block form a
large square with each side measuring
0.3 mile. If he walks around the block
twice, how far does he go?




                 CONFIDENTIAL              29
           More Practice
29) Nikki is buying some refrigerator
magnets for her friends. Her total bill is
$16.80. If magnets are $0.80 each, how
many magnets is she buying?




                  CONFIDENTIAL               30
          More Practice
30) Matt is making a scale model of a
building. The model is 3.4 feet tall. The
actual building is 41.48 feet tall. How
many times smaller is the model than the
actual building?




                 CONFIDENTIAL               31

								
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