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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 489 · 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. 1.98.4 × 10 =
  2. 2.126.1 ÷ 10 =
  3. 3.54.9 ÷ 1000 =
  4. 4.34.1 ÷ 10 =
  5. 5.22.59 ÷ 100 =
  6. 6.18.61 × 100 =
  7. 7.39.4 × 10 =
  8. 8.35.76 ÷ 10 =
  9. 9.4.83 × 1000 =
  10. 10.300.2 ÷ 100 =
  11. 11.303.4 × 1000 =
  12. 12.315.3 × 100 =
  13. 13.348.6 × 1000 =
  14. 14.80.9 ÷ 10 =
  15. 15.10.23 × 10 =
  16. 16.33.74 ÷ 10 =
  17. 17.13.11 ÷ 10 =
  18. 18.42.96 × 10 =
  19. 19.82.9 × 100 =
  20. 20.42.1 × 1000 =
  21. 21.10.66 × 100 =
  22. 22.397.1 × 1000 =
  23. 23.31.2 ÷ 1000 =
  24. 24.7.16 × 100 =
  25. 25.75.5 × 1000 =
  26. 26.242.7 × 1000 =
  27. 27.6.7 × 10 =
  28. 28.268.2 ÷ 100 =
  29. 29.287.9 × 10 =
  30. 30.19.24 × 1000 =
  31. 31.12.17 ÷ 1000 =
  32. 32.59.2 × 1000 =
  33. 33.50.6 × 10 =
  34. 34.117.9 ÷ 100 =
  35. 35.30.45 × 10 =
  36. 36.119.2 × 100 =
  37. 37.136.9 ÷ 100 =
  38. 38.137.3 × 10 =
  39. 39.136.3 ÷ 1000 =
  40. 40.25.91 ÷ 100 =

Answer key

  1. 984
  2. 12.61
  3. 0.0549
  4. 3.41
  5. 0.2259
  6. 1861
  7. 394
  8. 3.576
  9. 4830
  10. 3.002
  11. 303400
  12. 31530
  13. 348600
  14. 8.09
  15. 102.3
  16. 3.374
  17. 1.311
  18. 429.6
  19. 8290
  20. 42100
  21. 1066
  22. 397100
  23. 0.0312
  24. 716
  25. 75500
  26. 242700
  27. 67
  28. 2.682
  29. 2879
  30. 19240
  31. 0.01217
  32. 59200
  33. 506
  34. 1.179
  35. 304.5
  36. 11920
  37. 1.369
  38. 1373
  39. 0.1363
  40. 0.2591

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