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Add three decimals

Year 7 maths · Fieldbook Learning

Name ______________________ Date __________

Line up the decimal points. Add all three numbers.

  1. Add: 9.8 + 9.9 + 1.6
  2. Add: 7.4 + 1.8 + 8.8
  3. Add: 6.6 + 8.8 + 3.2
  4. Add: 9.9 + 9.2 + 2.8
  5. Add: 9.03 + 15.61 + 6.74
  6. Add: 14.4 + 11.9 + 6.63
  7. Add: 15.78 + 19.3 + 10.7
  8. Add: 7.91 + 10.9 + 11.5
  9. Add: 31.63 + 48.3 + 24.97
  10. Add: 44.95 + 47.98 + 46.2
  11. Add: 47.7 + 41.1 + 41.46
  12. Add: 14.5 + 31.7 + 47.3
  13. Add: 13.7 + 44.47 + 52.7
  14. Add: 41.6 + 19.02 + 16.54
  15. Add: 21.5 + 34.928 + 41.12
  16. Add: 28.9 + 55.336 + 74.258
  17. Add: 205.424 + 916.395 + 417.8
  18. Add: 544.9 + 121.75 + 665.5
  19. Add: 515.65 + 165.17 + 594.4
  20. Add: 558.9 + 784.655 + 490.81
More free practice: fieldbooklearning.com/uk/practice/year-7/add-three-decimals/

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Answer key: Add three decimals

  1. 21.3
  2. 18
  3. 18.6
  4. 21.9
  5. 31.38
  6. 32.93
  7. 45.78
  8. 30.31
  9. 104.9
  10. 139.13
  11. 130.26
  12. 93.5
  13. 110.87
  14. 77.16
  15. 97.548
  16. 158.494
  17. 1539.619
  18. 1332.15
  19. 1275.22
  20. 1834.365