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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 571 · 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. 1.457.8 × 1000 =
  2. 2.23.9 ÷ 10 =
  3. 3.31.81 × 1000 =
  4. 4.332.7 ÷ 1000 =
  5. 5.238.8 ÷ 100 =
  6. 6.152.6 ÷ 100 =
  7. 7.246.4 ÷ 10 =
  8. 8.423.5 × 100 =
  9. 9.446.7 × 100 =
  10. 10.287.8 × 100 =
  11. 11.3.62 ÷ 100 =
  12. 12.493.6 × 10 =
  13. 13.287.7 ÷ 10 =
  14. 14.41.3 × 1000 =
  15. 15.85.5 × 10 =
  16. 16.402.8 ÷ 100 =
  17. 17.22.77 ÷ 10 =
  18. 18.292.1 × 1000 =
  19. 19.24.61 ÷ 1000 =
  20. 20.184.5 × 1000 =
  21. 21.28.98 ÷ 10 =
  22. 22.468.9 × 1000 =
  23. 23.108.3 × 100 =
  24. 24.7.71 ÷ 1000 =
  25. 25.10.63 × 1000 =
  26. 26.49.66 × 10 =
  27. 27.337.9 × 100 =
  28. 28.267.2 × 10 =
  29. 29.19.86 ÷ 1000 =
  30. 30.226.3 × 100 =
  31. 31.285.3 × 10 =
  32. 32.21.1 ÷ 1000 =
  33. 33.9.78 × 100 =
  34. 34.421.7 ÷ 1000 =
  35. 35.32.91 ÷ 10 =
  36. 36.46.69 × 1000 =
  37. 37.14.17 ÷ 10 =
  38. 38.410.9 × 100 =
  39. 39.94.2 ÷ 100 =
  40. 40.49.72 × 100 =

Answer key

  1. 457800
  2. 2.39
  3. 31810
  4. 0.3327
  5. 2.388
  6. 1.526
  7. 24.64
  8. 42350
  9. 44670
  10. 28780
  11. 0.0362
  12. 4936
  13. 28.77
  14. 41300
  15. 855
  16. 4.028
  17. 2.277
  18. 292100
  19. 0.02461
  20. 184500
  21. 2.898
  22. 468900
  23. 10830
  24. 0.00771
  25. 10630
  26. 496.6
  27. 33790
  28. 2672
  29. 0.01986
  30. 22630
  31. 2853
  32. 0.0211
  33. 978
  34. 0.4217
  35. 3.291
  36. 46690
  37. 1.417
  38. 41090
  39. 0.942
  40. 4972

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