Practice Significant Figures in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

Significant figures are the meaningful digits in a measured quantity, reflecting its precision.

Think of them as the digits you can trust from a measuring tool.

Example 1

easy
Count the significant figures in each number: (a) 0.00420, (b) 3{,}050, (c) 7.300 \times 10^4.

Example 2

medium
A rectangle measures 4.5 cm by 3.25 cm. Calculate the area to the correct number of significant figures.

Example 3

easy
Round each to 3 significant figures: (a) 0.0046872, (b) 12{,}350, (c) 999.6.

Example 4

medium
A chemist measures 25.00 mL of solution using a burette and 0.5 mL using a dropper. She adds them. What is the total volume with correct significant figures?
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