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Adding and subtracting decimals

Line up decimal points to add and subtract hundredths.

Practice + answer key · 2 pages

Worksheet settings12 questions · 2 columns · A4
Values in hundredths

Enter whole-number counts of hundredths: 10 means 0.10 and 250 means 2.50. Both numbers use this range.

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mathsprig-1
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00d09681
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1 page
Adding and subtracting decimalsAdding and subtracting decimals. Practice. Calculate 0.32 + 3.59. Calculate 8.10 − 4.60. Calculate 8.11 + 4.92. Calculate 6.52 − 5.80. Calculate 4.61 + 0.10. Calculate 4.34 − 1.23. Calculate 2.00 + 6.60. Calculate 9.35 − 9.33. Calculate 1.23 + 7.18. Calculate 8.98 − 0.21. Calculate 2.87 + 1.36. Calculate 6.11 − 5.02.Name __________________________Date _______________Adding and subtracting decimalsCalculate each expression and write the answer to two decimal places.Worked exampleCalculate 0.10 + 0.20. → 0.300.10 is 10 hundredths and 0.20 is 20 hundredths.1.Calculate 0.32 + 3.59.2.Calculate 8.10 − 4.60.3.Calculate 8.11 + 4.92.4.Calculate 6.52 − 5.80.5.Calculate 4.61 + 0.10.6.Calculate 4.34 − 1.23.7.Calculate 2.00 + 6.60.8.Calculate 9.35 − 9.33.9.Calculate 1.23 + 7.18.10.Calculate 8.98 − 0.21.11.Calculate 2.87 + 1.36.12.Calculate 6.11 − 5.02.MathSprig · mathsprig.site · support@mathsprig.sitePage 1 of 1mathsprig-1 · mathsprig-v1 · 00d09681
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Practice + answer key · 2 pages

Decimals

What you’ll practice

Add and subtract decimals to two places, with no negative subtraction answers.

Keep tenths under tenths and hundredths under hundredths. Add or subtract as you would with whole numbers, keeping the decimal point in line.

How this skill works

Align decimal points so hundredths combine with hundredths and tenths combine with tenths. Treat both values as counts of hundredths during the calculation.

After adding or subtracting those integer counts, place the decimal point two digits from the right. Add a leading or trailing zero when needed to keep the notation clear.

Worked example

Calculate 0.10 + 0.20.
  1. 0.10 is 10 hundredths and 0.20 is 20 hundredths.
  2. 10 + 20 = 30 hundredths.
  3. 30 hundredths is 0.30 exactly.

Answer: 0.30

Teaching notes

  • Use a zero placeholder when a position would otherwise be empty.
  • Subtract the smaller value from the larger on these practice sheets.
Practice questions
  1. Calculate 0.32 + 3.59.
  2. Calculate 8.10 − 4.60.
  3. Calculate 8.11 + 4.92.
  4. Calculate 6.52 − 5.80.
  5. Calculate 4.61 + 0.10.
  6. Calculate 4.34 − 1.23.
  7. Calculate 2.00 + 6.60.
  8. Calculate 9.35 − 9.33.
  9. Calculate 1.23 + 7.18.
  10. Calculate 8.98 − 0.21.
  11. Calculate 2.87 + 1.36.
  12. Calculate 6.11 − 5.02.
Answers and steps
  1. 3.91
    1. Work in hundredths: 32 + 359 = 391 hundredths. Place the decimal point two digits from the right: 3.91.
  2. 3.50
    1. Work in hundredths: 810 − 460 = 350 hundredths. Place the decimal point two digits from the right: 3.50.
  3. 13.03
    1. Work in hundredths: 811 + 492 = 1303 hundredths. Place the decimal point two digits from the right: 13.03.
  4. 0.72
    1. Work in hundredths: 652 − 580 = 72 hundredths. Place the decimal point two digits from the right: 0.72.
  5. 4.71
    1. Work in hundredths: 461 + 10 = 471 hundredths. Place the decimal point two digits from the right: 4.71.
  6. 3.11
    1. Work in hundredths: 434 − 123 = 311 hundredths. Place the decimal point two digits from the right: 3.11.
  7. 8.60
    1. Work in hundredths: 200 + 660 = 860 hundredths. Place the decimal point two digits from the right: 8.60.
  8. 0.02
    1. Work in hundredths: 935 − 933 = 2 hundredths. Place the decimal point two digits from the right: 0.02.
  9. 8.41
    1. Work in hundredths: 123 + 718 = 841 hundredths. Place the decimal point two digits from the right: 8.41.
  10. 8.77
    1. Work in hundredths: 898 − 21 = 877 hundredths. Place the decimal point two digits from the right: 8.77.
  11. 4.23
    1. Work in hundredths: 287 + 136 = 423 hundredths. Place the decimal point two digits from the right: 4.23.
  12. 1.09
    1. Work in hundredths: 611 − 502 = 109 hundredths. Place the decimal point two digits from the right: 1.09.