Grade 5 Math · Decimal Addition and Subtraction

Grade 5 Decimal Addition and Subtraction Practice Test

Build Grade 5 Math skills with five 10-question practice tests on decimal addition, decimal subtraction, place-value alignment, estimation, zeros, and real-world measurement problems.

Decimal Addition and Subtraction Practice Tests

These Grade 5 Math practice tests help students add and subtract decimals accurately. Students practice aligning decimal points, using zeros as placeholders, estimating, solving measurement and money problems, and checking exact answers with place-value reasoning.

Skills covered

  • Aligning ones, tenths, hundredths, and thousandths
  • Adding and subtracting decimals with different numbers of digits
  • Using zeros as placeholders without changing a number’s value
  • Estimating decimal sums and differences
  • Solving money, length, volume, and measurement word problems
  • Checking decimal calculations with place-value and inverse-operation reasoning

How to use these practice tests

Write each number with matching place values before calculating. Add zeros when useful, estimate to check reasonableness, and label units in measurement and money problems.

For more Grade 5 Math practice, return to the Grade 5 Math category.

5. Test

Grade 5 Decimal Addition and Subtraction Practice Tests

A 10-question Grade 5 Math practice test on adding and subtracting decimals, place-value alignment, estimation, zeros, and real-world measurement problems.

Align decimal points carefully, use place-value reasoning, calculate the exact result, and estimate when the question asks for an approximate answer.

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

What is 3.45+2.63.45 + 2.6?

Please select an answer first.

Correct answer: A

The correct answer is 6.05.

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: Write 3.45 + 2.60 = 6.05.
  3. Check the choice: The correct choice is 6.05.

Write 3.45 + 2.60 = 6.05.

2. QuestionMultiple choice

What is 9.1−4.6759.1 - 4.675?

Please select an answer first.

Correct answer: B

The correct answer is 4.425.

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: Write 9.100 − 4.675 = 4.425.
  3. Check the choice: The correct choice is 4.425.

Write 9.100 − 4.675 = 4.425.

3. QuestionMultiple choice

What is 6.2+0.086.2 + 0.08?

Please select an answer first.

Correct answer: C

The correct answer is 6.28.

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: Write 6.20 + 0.08 = 6.28.
  3. Check the choice: The correct choice is 6.28.

Write 6.20 + 0.08 = 6.28.

4. QuestionMultiple choice

What is 10.00−0.00610.00 - 0.006?

Please select an answer first.

Correct answer: D

The correct answer is 9.994.

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: Write 10.000 − 0.006 = 9.994.
  3. Check the choice: The correct choice is 9.994.

Write 10.000 − 0.006 = 9.994.

5. QuestionMultiple choice

What is 2.999+1.0012.999 + 1.001?

Please select an answer first.

Correct answer: A

The correct answer is 4.000.

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: The thousandths combine exactly: 2.999 + 1.001 = 4.000.
  3. Check the choice: The correct choice is 4.000.

The thousandths combine exactly: 2.999 + 1.001 = 4.000.

6. QuestionMultiple choice

What is 20.5−7.7520.5 - 7.75?

Please select an answer first.

Correct answer: B

The correct answer is 12.75.

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: Write 20.50 − 7.75 = 12.75.
  3. Check the choice: The correct choice is 12.75.

Write 20.50 − 7.75 = 12.75.

7. QuestionMultiple choice

What number makes 4.6+□=7.254.6 + \square = 7.25 true?

Please select an answer first.

Correct answer: C

The correct answer is 2.65.

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: Subtract 4.60 from 7.25: 7.25 − 4.60 = 2.65.
  3. Check the choice: The correct choice is 2.65.

Subtract 4.60 from 7.25: 7.25 − 4.60 = 2.65.

8. QuestionMultiple choice

What is 15−6.87515 - 6.875?

Please select an answer first.

Correct answer: D

The correct answer is 8.125.

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: Write 15.000 − 6.875 = 8.125.
  3. Check the choice: The correct choice is 8.125.

Write 15.000 − 6.875 = 8.125.

9. QuestionMultiple choice

What is 0.4+0.04+0.0040.4 + 0.04 + 0.004?

Please select an answer first.

Correct answer: A

The correct answer is 0.444.

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: Add 0.400 + 0.040 + 0.004 = 0.444.
  3. Check the choice: The correct choice is 0.444.

Add 0.400 + 0.040 + 0.004 = 0.444.

10. QuestionMultiple choice

Which statement best summarizes decimal addition and subtraction?

Please select an answer first.

Correct answer: B

The correct answer is Align decimal points, use place-value reasoning, calculate, and check with estimation..

  1. Align the decimal points: Write the numbers so that ones, tenths, hundredths, and thousandths are in matching columns.
  2. Calculate and check: Accurate decimal operations depend on aligned place values and careful checking.
  3. Check the choice: The correct choice is Align decimal points, use place-value reasoning, calculate, and check with estimation..

Accurate decimal operations depend on aligned place values and careful checking.

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Frequently asked questions about Grade 5 Decimal Addition and Subtraction

Why must decimal points be aligned?

Alignment places ones, tenths, hundredths, and thousandths in matching columns so each place value is combined correctly.

Can zeros be added to the end of a decimal?

Yes. Zeros at the end of a decimal do not change its value and can help align place values.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 5 Decimal Addition and Subtraction questions in total.