Grade 4 Math · Rounding and Estimation
Build Grade 4 Math skills with five 10-question practice tests on rounding whole numbers and decimals and estimating sums and differences.
These Grade 4 Math practice tests help students round whole numbers and decimals and estimate sums and differences. Students use the next digit to decide whether to round up or down and choose compatible numbers for quick estimates.
First identify the place to which you are rounding. Look at the digit immediately to its right: 5 or more means round up, and 4 or less means keep the rounding digit. For estimates, round the numbers before adding or subtracting.
For more Grade 4 Math practice, return to the Grade 4 Math category.
4. Test
A 10-question Grade 4 Math practice test on rounding whole numbers and decimals and estimating sums and differences.
Identify the requested place, inspect the next digit, round correctly, and use compatible numbers to estimate when needed.
Please select an answer first.
Correct answer: A
The correct answer is .
Round 19 to 20 and 42 to 40. The estimate is .
Please select an answer first.
Correct answer: B
The correct answer is .
Round 98 to 100 and 51 to 50. The estimate is .
Please select an answer first.
Correct answer: C
The correct answer is .
Round 304 to 300 and 197 to 200. The estimate is .
Please select an answer first.
Correct answer: D
The correct answer is .
Round 799 to 800 and 302 to 300. The estimate is .
Please select an answer first.
Correct answer: A
The correct answer is .
Round 4.8 to 5 and 2.1 to 2. Then 5 + 2 = 7.
Please select an answer first.
Correct answer: B
The correct answer is .
Round 7.6 to 8 and 3.2 to 3. Then 8 - 3 = 5.
Please select an answer first.
Correct answer: C
The correct answer is .
Round 0.39 to 0.4 and 0.61 to 0.6. The estimate is 1.0.
Please select an answer first.
Correct answer: D
The correct answer is .
Round 5.49 to 5 and 1.51 to 2. Then 5 - 2 = 3.
Please select an answer first.
Correct answer: A
The correct answer is .
The hundreds digit is 9, so 2,951 rounds up to 3,000.
Please select an answer first.
Correct answer: B
The correct answer is .
The hundreds digit is 4, so 5,449 rounds down to 5,000.
Look at the digit immediately to the right of the rounding place. Round up when it is 5 or more; round down when it is 4 or less.
An estimate is a close answer found by using easier numbers. Rounding numbers before an operation can make a quick estimate.
The page includes five mini tests with 10 questions each, for 50 Grade 4 Rounding and Estimation questions in total.
