Best Estimate
Multiply Decimals
Divide Decimals
Story Problems
100

What is the best estimate for 6 x $3.52 (hint: round to the nearest whole number)

6 x $4= $24

100

7 x 0.8

5.6

100

21.7 / 10 (hint: is 10 a power of ten?)

2.17

100

A watermelon weighs 19.8 pounds. About how much do 4 watermelons weigh?

20 x 4=80 pounds

200

What is the best estimate for 4.6 x 3?

5 x 3= 15

200

2.9 x 5

14.5

200

6.8 / 100 (hint: is 100 a power of ten?)

0.068

200

There are 23.6 grams of protein in 4 ounces of cashews. About how many grams are in one ounce of cashews?

About 6 grams

300

What is the best estimate for $21.05 / 4

$20 / 4= $5

300

43 x 2.8

120.4

300

135.3 / 11

12.3

300

Mack earned $50.70 mowing lawns. If he earned $8.45 for each lawn he mowed, how many lawns did he mow?

6 Lawns

400

What is the best estimate for 87.2 x 41? (hint: round to the nearest tens place)

90 x 40= 3,600

400

0.11 x 0.91

0.1001

400

0.84 / 0.3

2.8

400

Sally and her 4 friends bought a package of crackers for $3.69. How much will each friend pay to the nearest cent if the cost is divided equally?

$0.74

500
What is the best estimate for 120.6 / 2?

120 / 2=60

500

5.25 x 4.2

22.05

500
$16.25 / 2.6

$6.25

500
Ms. Hagan exercises for 0.75 hour on Monday, Wednesday, and Friday each week. How many hours will she exercise in 4 weeks?

9 hours

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