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.
Showing a random 20 of 50 problems.
Example 1
mediumHow many significant figures does have?
Example 2
mediumA student rounds to two sig figs by standard 'round half up' and writes . Is that correct?
Example 3
mediumCompute and report with the correct number of significant figures.
Example 4
easyRound to two significant figures.
Example 5
easyHow many significant figures does have?
Example 6
hardA rectangle has length cm (4 s.f.) and width cm (2 s.f.). Compute the perimeter and the area with correct rules.
Example 7
easyRound to two significant figures.
Example 8
mediumExpress with exactly significant figures in scientific notation.
Example 9
mediumRound to three significant figures.
Example 10
challengeWhy is rounding intermediate steps to fewer significant figures considered bad practice? Illustrate with computed two ways.
Example 11
easyHow many significant figures does have?
Example 12
mediumCompute and report with the correct significant figures.
Example 13
easyHow many significant figures does have?
Example 14
easyRound to two significant figures.
Example 15
challengeEvaluate and report with correct significant figures.
Example 16
easyCount the significant figures in each number: (a) , (b) , (c) .
Example 17
challengeA density is found by with g (4 s.f.) and mL (2 s.f.). Report with correct sig figs.
Example 18
easyHow many significant figures does have?
Example 19
challengeWhy does have three significant figures while (no decimal) has one? Round to one sig fig.
Example 20
mediumRound to two significant figures.