Multiplication of Whole Numbers and Decimals Answers

1. Marla can run a mile in 9.25 minutes. If it takes her 15 times as long to run a marathon, what is the best estimate for how long it takes her to run a marathon?

• A 90 minutes

• B. 135 minutes

• C 150 minutes

• D 180 minutes

2.There are 36 large fish tanks at the zoo. Each tank holds 205 gallons of water. How many gallons of water would it take to fill all of the tanks?

• A 7,380

• B 7,210

• C 6,380

• D 6,361

3. Lucia scores 8.65 points on her first gymnastics event at a meet. If she gets the same score on each of the four events, what will be her total score?

• A 32.48

• B 34.6

• C 34.8

• D 346

4

• A $3,768

• B $3,748

• C $2,784

• D $942

• A 0.08 x 0.04

• B 0.8 x 0.4

• C 0.7 x 0.3

• D 0.4 x 0.6

6.Leo has 59 bricks each measuring 0.19 m wide. He stacks the bricks to make a tower. Which of the following provides the best estimate of the height of Leo’s tower?

• A 100 x 0.15 = 15

• B 60 x 0.2 = 12

• C 60 x 0.1 = 6

• D 70 x 0.2 = 14

Pick from the choices below if yours is not here than you made a math error.

• 20.7 cm

• 207 cm

• 17.5 cm

• 17.25 cm

• A 0.31 x 3

• B 3.1 x 3

• C 31 x 3

• D 3.01 x 3

9. Sharon bought 4.5 meters of fabric that cost $3.55 per meter. She also bought 2.3 meters of ribbon that cost $6.55 per meter. Which expression represents t, the total amount of money that Sharon spent?

• A t = (4.5 x 2.3) + ($3.55 x $6.55)

• B t = (4.5 x $3.55) x (2.3 x $6.55)

• C t = (4.5 x $3.55) + (2.3 x $6.55)

• D t = (4.5 x $3.55) - (2.3 x $6.55)

10. A rectangle has a length of 2.4 inches. The width is three times the length of the rectangle. What is the area of the rectangle?

• 7.2

• 9.6

• 19.2

• 17.28