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Multi-Digit Decimal Operations

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Multi-Digit Decimal Operations worksheet preview
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Multi-Digit Decimal Operations

For each calculation, line up the decimal points. You may add zeros to make the decimal parts the same length. Show your steps in the space provided.

Add Decimals

Calculate each sum. Keep the decimal points in the same column.

1.38 + 9.7 =
2.625 + 8.39 =
3.48 + 3.756 =
4.Wyatt runs 2.85 miles on Saturday and 3.6 miles on Sunday. How many miles does she run altogether?
5.A science project uses 12.75 meters of blue ribbon and 4.685 meters of gold ribbon. How many meters of ribbon are used in all?

Subtract Decimals

Calculate each difference. Add placeholder zeros when they help you keep place values clear.

6.6 − 14.28 =
7.305 − 17.86 =
8.50 − 26.735 =
9.A water jug held 8.5 gallons. After 2.76 gallons were poured out, how many gallons remained?
10.A board is 6.25 feet long. A carpenter cuts off a piece that is 1.875 feet long. What length of board is left?

Place Value and Alignment

Use what you know about decimal places to answer these questions.

11.Which setup correctly aligns the decimal points for 18.4 + 2.75?
  • 18.4 + 2.75
  • 18.4 +2.75
  • 18.4 + 2.75
  • 18.4 + 2.75
12.Why should the decimal points line up when adding or subtracting decimals?
13.Match each decimal place to its value in 7.362.
  • The 3
  • The 6
  • The 2
  • The 7
  • 2 thousandths
  • 7 ones
  • 6 hundredths
  • 3 tenths

3 printable pages

  • Multi-Digit Decimal Operations, page 1 of 3: Add Decimals

    Page 1

  • Multi-Digit Decimal Operations, page 2 of 3: Subtract Decimals, Place Value and Alignment

    Page 2

  • Multi-Digit Decimal Operations, page 3 of 3: 12. Why should the decimal points line up when adding or subtracting decimals?

    Page 3

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