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Multiplying Decimals Worksheet

Speed calculation lesson 18: Decimal × decimal · Set 766 · 40 questions
TalentJR

The fast method (Count the places): Forget the points and multiply the whole numbers: 2.5 × 1.4 → 25 × 14 = 350. Count the decimal places in both numbers: 1 + 1 = 2. Put the point that many places from the right: 3.50 — then drop the 0 at the end: 3.5.

NameDateTime takenScore ___ / 40
  1. 1.3.1 × 3.8 =
  2. 2.5.9 × 0.36 =
  3. 3.0.86 × 1.1 =
  4. 4.0.84 × 2.5 =
  5. 5.0.87 × 0.3 =
  6. 6.5.1 × 3.3 =
  7. 7.0.64 × 1.1 =
  8. 8.7.2 × 0.9 =
  9. 9.4.2 × 0.5 =
  10. 10.4.2 × 0.07 =
  11. 11.1.1 × 0.32 =
  12. 12.2.4 × 0.34 =
  13. 13.0.52 × 0.7 =
  14. 14.0.52 × 2.1 =
  15. 15.0.71 × 1.2 =
  16. 16.7.8 × 0.27 =
  17. 17.3.1 × 0.14 =
  18. 18.4.8 × 1.5 =
  19. 19.4.8 × 2.5 =
  20. 20.0.71 × 1.7 =
  21. 21.4.7 × 0.24 =
  22. 22.0.11 × 3.4 =
  23. 23.0.77 × 1.8 =
  24. 24.0.8 × 0.9 =
  25. 25.7.6 × 2.1 =
  26. 26.0.08 × 3.9 =
  27. 27.0.67 × 1.8 =
  28. 28.0.31 × 2.4 =
  29. 29.2.1 × 3.6 =
  30. 30.0.92 × 1.5 =
  31. 31.0.91 × 1.1 =
  32. 32.0.97 × 3.1 =
  33. 33.7.8 × 0.6 =
  34. 34.3.1 × 0.31 =
  35. 35.0.61 × 0.9 =
  36. 36.0.16 × 3.1 =
  37. 37.5.6 × 3.1 =
  38. 38.0.3 × 2.7 =
  39. 39.6.5 × 0.5 =
  40. 40.0.6 × 0.12 =

Answer key

  1. 11.78
  2. 2.124
  3. 0.946
  4. 2.1
  5. 0.261
  6. 16.83
  7. 0.704
  8. 6.48
  9. 2.1
  10. 0.294
  11. 0.352
  12. 0.816
  13. 0.364
  14. 1.092
  15. 0.852
  16. 2.106
  17. 0.434
  18. 7.2
  19. 12
  20. 1.207
  21. 1.128
  22. 0.374
  23. 1.386
  24. 0.72
  25. 15.96
  26. 0.312
  27. 1.206
  28. 0.744
  29. 7.56
  30. 1.38
  31. 1.001
  32. 3.007
  33. 4.68
  34. 0.961
  35. 0.549
  36. 0.496
  37. 17.36
  38. 0.81
  39. 3.25
  40. 0.072

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