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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 631 · 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. 1.251.3 × 10 =
  2. 2.183.6 ÷ 100 =
  3. 3.29.6 × 100 =
  4. 4.24.17 × 1000 =
  5. 5.0.46 ÷ 10 =
  6. 6.19.4 × 1000 =
  7. 7.398.6 × 1000 =
  8. 8.461.3 × 100 =
  9. 9.41.39 ÷ 1000 =
  10. 10.42.67 × 10 =
  11. 11.4.12 × 10 =
  12. 12.43.69 × 1000 =
  13. 13.10.13 ÷ 100 =
  14. 14.486.2 ÷ 100 =
  15. 15.12.91 ÷ 10 =
  16. 16.66.5 ÷ 100 =
  17. 17.29.3 ÷ 10 =
  18. 18.486.5 ÷ 10 =
  19. 19.22.41 ÷ 10 =
  20. 20.403.1 ÷ 1000 =
  21. 21.16.73 × 1000 =
  22. 22.300.7 × 100 =
  23. 23.31.33 × 10 =
  24. 24.47.08 × 100 =
  25. 25.8.05 × 10 =
  26. 26.118.7 × 10 =
  27. 27.8.91 × 10 =
  28. 28.39.57 × 10 =
  29. 29.70.7 ÷ 100 =
  30. 30.214.1 × 100 =
  31. 31.6.51 × 10 =
  32. 32.15.28 × 10 =
  33. 33.23.06 × 10 =
  34. 34.194.8 ÷ 10 =
  35. 35.10.31 × 100 =
  36. 36.8.61 × 100 =
  37. 37.22.5 × 10 =
  38. 38.26.2 × 1000 =
  39. 39.19.17 ÷ 100 =
  40. 40.42.35 × 10 =

Answer key

  1. 2513
  2. 1.836
  3. 2960
  4. 24170
  5. 0.046
  6. 19400
  7. 398600
  8. 46130
  9. 0.04139
  10. 426.7
  11. 41.2
  12. 43690
  13. 0.1013
  14. 4.862
  15. 1.291
  16. 0.665
  17. 2.93
  18. 48.65
  19. 2.241
  20. 0.4031
  21. 16730
  22. 30070
  23. 313.3
  24. 4708
  25. 80.5
  26. 1187
  27. 89.1
  28. 395.7
  29. 0.707
  30. 21410
  31. 65.1
  32. 152.8
  33. 230.6
  34. 19.48
  35. 1031
  36. 861
  37. 225
  38. 26200
  39. 0.1917
  40. 423.5

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