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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 404 · 40 questions
TalentJR

The fast method (Jump the point): Count the zeros: 10 → 1 jump, 100 → 2 jumps, 1000 → 3 jumps. × moves the point right; ÷ moves it left. Run out of digits? Fill the gaps with 0s. Drop 0s at the end of a decimal: 3.40 is 3.4.

NameDateTime takenScore ___ / 40
  1. 1.254.1 × 10 =
  2. 2.3.76 × 1000 =
  3. 3.482.5 ÷ 100 =
  4. 4.494.7 × 10 =
  5. 5.453.9 ÷ 10 =
  6. 6.491.4 × 1000 =
  7. 7.4.28 × 10 =
  8. 8.222.1 ÷ 100 =
  9. 9.198.4 × 1000 =
  10. 10.20.58 × 10 =
  11. 11.340.2 × 1000 =
  12. 12.210.5 × 10 =
  13. 13.83.1 × 1000 =
  14. 14.295.1 ÷ 10 =
  15. 15.464.1 ÷ 100 =
  16. 16.36.78 × 1000 =
  17. 17.25.04 × 10 =
  18. 18.12.21 × 100 =
  19. 19.22.7 × 1000 =
  20. 20.267.6 × 100 =
  21. 21.465.4 ÷ 10 =
  22. 22.27.86 × 10 =
  23. 23.47.01 × 100 =
  24. 24.255.7 ÷ 1000 =
  25. 25.7.8 ÷ 1000 =
  26. 26.6.91 × 10 =
  27. 27.74.3 × 10 =
  28. 28.2.73 ÷ 10 =
  29. 29.111.9 × 1000 =
  30. 30.10.44 ÷ 100 =
  31. 31.436.8 ÷ 100 =
  32. 32.68.1 × 100 =
  33. 33.33.83 × 10 =
  34. 34.49.89 ÷ 10 =
  35. 35.101.5 ÷ 10 =
  36. 36.296.8 ÷ 10 =
  37. 37.1.3 ÷ 10 =
  38. 38.7.25 ÷ 1000 =
  39. 39.2.36 ÷ 10 =
  40. 40.13.84 × 100 =

Answer key

  1. 2541
  2. 3760
  3. 4.825
  4. 4947
  5. 45.39
  6. 491400
  7. 42.8
  8. 2.221
  9. 198400
  10. 205.8
  11. 340200
  12. 2105
  13. 83100
  14. 29.51
  15. 4.641
  16. 36780
  17. 250.4
  18. 1221
  19. 22700
  20. 26760
  21. 46.54
  22. 278.6
  23. 4701
  24. 0.2557
  25. 0.0078
  26. 69.1
  27. 743
  28. 0.273
  29. 111900
  30. 0.1044
  31. 4.368
  32. 6810
  33. 338.3
  34. 4.989
  35. 10.15
  36. 29.68
  37. 0.13
  38. 0.00725
  39. 0.236
  40. 1384

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