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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 775 · 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. 1.420.9 ÷ 10 =
  2. 2.4.01 ÷ 10 =
  3. 3.14.49 × 1000 =
  4. 4.278.3 × 100 =
  5. 5.273.3 ÷ 100 =
  6. 6.2.86 × 10 =
  7. 7.28.4 × 100 =
  8. 8.36.64 × 10 =
  9. 9.499.1 ÷ 10 =
  10. 10.67.3 ÷ 100 =
  11. 11.28.71 ÷ 100 =
  12. 12.383.1 ÷ 10 =
  13. 13.250.4 × 1000 =
  14. 14.23.9 ÷ 1000 =
  15. 15.495.8 × 1000 =
  16. 16.21.55 × 1000 =
  17. 17.46.1 × 10 =
  18. 18.463.1 × 100 =
  19. 19.36.87 × 100 =
  20. 20.28.82 ÷ 10 =
  21. 21.308.5 ÷ 100 =
  22. 22.363.1 × 1000 =
  23. 23.22.91 × 10 =
  24. 24.286.6 ÷ 1000 =
  25. 25.132.3 ÷ 100 =
  26. 26.198.5 ÷ 100 =
  27. 27.33.97 × 1000 =
  28. 28.102.1 ÷ 100 =
  29. 29.45.97 ÷ 1000 =
  30. 30.27.15 × 10 =
  31. 31.265.4 ÷ 10 =
  32. 32.114.1 ÷ 1000 =
  33. 33.6.02 × 1000 =
  34. 34.42.25 × 1000 =
  35. 35.109.9 × 10 =
  36. 36.36.8 ÷ 100 =
  37. 37.395.2 ÷ 100 =
  38. 38.48.66 × 1000 =
  39. 39.29.23 × 10 =
  40. 40.303.6 × 10 =

Answer key

  1. 42.09
  2. 0.401
  3. 14490
  4. 27830
  5. 2.733
  6. 28.6
  7. 2840
  8. 366.4
  9. 49.91
  10. 0.673
  11. 0.2871
  12. 38.31
  13. 250400
  14. 0.0239
  15. 495800
  16. 21550
  17. 461
  18. 46310
  19. 3687
  20. 2.882
  21. 3.085
  22. 363100
  23. 229.1
  24. 0.2866
  25. 1.323
  26. 1.985
  27. 33970
  28. 1.021
  29. 0.04597
  30. 271.5
  31. 26.54
  32. 0.1141
  33. 6020
  34. 42250
  35. 1099
  36. 0.368
  37. 3.952
  38. 48660
  39. 292.3
  40. 3036

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