Estimating with Significant Figures Quiz

Estimate the sum of 44 and 58 by rounding each number to 1 significant figure.

• 90

• 100

• 110

• 120

Estimate the difference between 123 and 78 by rounding each number to 1 significant figure.

• 30

• 40

• 50

• 60

Estimate the product of 6.3 and 4.8 by rounding each number to 1 significant figure.

• 20

• 25

• 30

• 35

Estimate the quotient of 92 divided by 3.1 by rounding each number to 1 significant figure.

• 20

• 25

• 30

• 35

If a car travels 57 miles in 1.8 hours, estimate the speed in miles per hour by rounding each number to 1 significant figure.

• 20 mph

• 30 mph

• 40 mph

• 50 mph

Estimate the sum of 0.56 and 0.34 by rounding each number to 1 significant figure.

• 0.8

• 0.9

• 1.0

• 1.1

Estimate the difference between 8.9 and 2.3 by rounding each number to 1 significant figure.

• 5

• 6

• 7

• 8

Estimate the product of 0.71 and 0.48 by rounding each number to 1 significant figure.

• 0.25

• 0.35

• 0.45

• 0.28

Estimate the quotient of 45 divided by 5.2 by rounding each number to 1 significant figure.

• 8

• 9

• 10

• 11

A recipe requires 2.8 ounces of sugar. Estimate the amount needed by rounding to 1 significant figure.

• 2 ounces

• 3 ounces

• 4 ounces

• 5 ounces