NumicornNumicornLearn, solve, progress

Grade 4 Math · Rounding and Estimation

Grade 4 Rounding and Estimation Practice Test

Build Grade 4 Math skills with five 10-question practice tests on rounding whole numbers and decimals and estimating sums and differences.

Rounding and Estimation Practice Tests

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.

Skills covered

  • Rounding to the nearest ten, hundred, and thousand
  • Rounding decimals to the nearest whole number and tenth
  • Estimating sums and differences
  • Using compatible numbers in real-world problems
  • Checking whether an estimate is reasonable

How to use these practice tests

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.

Select a test

5 Tests
1. Test2. Test3. Test4. Test5. Test

5. Test

Grade 4 Rounding and Estimation Practice Tests

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.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

A store has 49 red stickers and 32 blue stickers. About how many stickers are there altogether?

Please select an answer first.

Correct answer: A

The correct answer is 8080.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: Round 49 to 50 and 32 to 30. About 80 stickers are there.
  3. State the estimate: The correct choice is 8080.

Round 49 to 50 and 32 to 30. About 80 stickers are there.

2. QuestionMultiple choice

A book has 198 pages. Mia reads 103 pages. About how many pages are left?

Please select an answer first.

Correct answer: B

The correct answer is 100100.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: Round 198 to 200 and 103 to 100. About 100 pages remain.
  3. State the estimate: The correct choice is 100100.

Round 198 to 200 and 103 to 100. About 100 pages remain.

3. QuestionMultiple choice

A snack costs $4.79 and a drink costs $2.18. About how much do they cost together?

Please select an answer first.

Correct answer: C

The correct answer is $7.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: Round $4.79 to $5 and $2.18 to $2. The estimate is $7.
  3. State the estimate: The correct choice is $7.

Round $4.79 to $5 and $2.18 to $2. The estimate is $7.

4. QuestionMultiple choice

A container has 8.68.6 liters. It loses 3.23.2 liters. About how many liters remain?

Please select an answer first.

Correct answer: D

The correct answer is 66.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: Round 8.6 to 9 and 3.2 to 3. About 6 liters remain.
  3. State the estimate: The correct choice is 66.

Round 8.6 to 9 and 3.2 to 3. About 6 liters remain.

5. QuestionMultiple choice

A school collects 623 cans and then 278 more. About how many cans are collected?

Please select an answer first.

Correct answer: A

The correct answer is 900900.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: Round 623 to 600 and 278 to 300. About 900 cans are collected.
  3. State the estimate: The correct choice is 900900.

Round 623 to 600 and 278 to 300. About 900 cans are collected.

6. QuestionMultiple choice

A city has 1,497 trees in one park and removes 506. About how many trees remain?

Please select an answer first.

Correct answer: B

The correct answer is 1,0001,000.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: Round 1,497 to 1,500 and 506 to 500. About 1,000 trees remain.
  3. State the estimate: The correct choice is 1,0001,000.

Round 1,497 to 1,500 and 506 to 500. About 1,000 trees remain.

7. QuestionMultiple choice

A cyclist rides 2.492.49 miles in the morning and 3.513.51 miles later. About how many miles does the cyclist ride?

Please select an answer first.

Correct answer: C

The correct answer is 66.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: Round 2.49 to 2 and 3.51 to 4. The estimate is 6 miles.
  3. State the estimate: The correct choice is 66.

Round 2.49 to 2 and 3.51 to 4. The estimate is 6 miles.

8. QuestionMultiple choice

A route is 89.789.7 miles long. About how long is it to the nearest whole mile?

Please select an answer first.

Correct answer: D

The correct answer is 9090.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: The tenths digit is 7, so 89.7 rounds up to 90 miles.
  3. State the estimate: The correct choice is 9090.

The tenths digit is 7, so 89.7 rounds up to 90 miles.

9. QuestionMultiple choice

A library receives 4,5014,501 new books. About how many books is that to the nearest thousand?

Please select an answer first.

Correct answer: A

The correct answer is 5,0005,000.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: The hundreds digit is 5, so 4,501 rounds up to 5,000.
  3. State the estimate: The correct choice is 5,0005,000.

The hundreds digit is 5, so 4,501 rounds up to 5,000.

10. QuestionMultiple choice

A farm has 6,2486,248 apples and sells 2,1512,151. About how many apples remain?

Please select an answer first.

Correct answer: B

The correct answer is 4,0004,000.

  1. Find the rounding place: Identify whether the problem asks for the nearest ten, hundred, thousand, whole number, or tenth.
  2. Check the next digit: Round 6,248 to 6,000 and 2,151 to 2,000. About 4,000 apples remain.
  3. State the estimate: The correct choice is 4,0004,000.

Round 6,248 to 6,000 and 2,151 to 2,000. About 4,000 apples remain.

Previous testNext test

Frequently asked questions about Grade 4 Rounding and Estimation

How do you know whether to round up or down?

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.

What is an estimate?

An estimate is a close answer found by using easier numbers. Rounding numbers before an operation can make a quick estimate.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 4 Rounding and Estimation questions in total.