Math G7 Chapter 3 Mastering Significant Figures and Estimation

How many significant figures are in the number 0.00456?

• 2

• 4

• 5

• 3

Round the number 123.456 to three significant figures.

• 123

• 120

• 123.5

• 124

Estimate the sum of 48.7 and 3.2 using rounding.

• 52

• 60

• 50

• 55

What is the approximate value of 19.99 when rounded to the nearest whole number?

• 20

• 21

• 19

• 18

Calculate 5.67 + 3.1 and express the answer with the correct significant figures.

• 8.8

• 8.0

• 7.5

• 9.7

Identify the number of significant figures in 1002.

• 3

• 5

• 2

• 4

Round 0.00789 to two significant figures.

• 0.007

• 0.0078

• 0.0079

• 0.008

Estimate the product of 6.4 and 2.1.

• 10

• 12

• 14

• 8.5

What is the approximate value of 1500 when rounded to two significant figures?

• 1600

• 1501

• 1500

• 1400

How many significant figures are in the number 0.02030?

• 4

• 2

• 3

• 5