Practice Rounding in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
Replacing a number with a nearby simpler approximation at a specified place value, using the digit to the right to decide.
Simplifying for easier calculation or communicationβ\$19.87 becomes 'about \$20'.
Showing a random 20 of 50 problems.
Example 1
mediumUse rounding to estimate . Then compute the exact product.
Example 2
hardRound to the nearest hundredth.
Example 3
mediumRound to two significant figures.
Example 4
mediumRound to the nearest thousandth.
Example 5
challengeA statistician must round each of to the nearest whole number. Compare the totals using round-half-up vs round-half-to-even.
Example 6
easyRound to the nearest hundredth. Then round to the nearest tenth.
Example 7
easyRound to the nearest tenth (round half up).
Example 8
hardWhat is the maximum possible value of a number that rounds to (to the nearest tenth)?
Example 9
mediumRound to significant figures. Then round to significant figures.
Example 10
hardRound to the nearest whole number, then to the nearest tenth.
Example 11
easyRound to the nearest ten.
Example 12
challengeThree numbers each round to (nearest ten). What is the maximum possible value of their sum, using whole numbers?
Example 13
easyEstimate by rounding each to the nearest ten.
Example 14
hardA class of students must be split into groups of . Round up to find the minimum number of groups.
Example 15
mediumEstimate by rounding each to the nearest hundred, then compare to the exact answer.
Example 16
mediumRound to the nearest whole number.
Example 17
mediumRound to (a) the nearest tenth, (b) the nearest thousandth.
Example 18
mediumRound to the nearest hundred.
Example 19
mediumEstimate by rounding.
Example 20
mediumRound to (a) decimal places, (b) decimal places, (c) significant figures.