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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 39 · 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. 1.341.5 ÷ 100 =
  2. 2.26.1 ÷ 10 =
  3. 3.241.9 ÷ 1000 =
  4. 4.39.88 × 100 =
  5. 5.40.68 ÷ 10 =
  6. 6.39.85 ÷ 100 =
  7. 7.15.91 × 10 =
  8. 8.404.4 ÷ 10 =
  9. 9.410.9 × 100 =
  10. 10.8.13 × 100 =
  11. 11.4.85 ÷ 10 =
  12. 12.437.9 ÷ 1000 =
  13. 13.19.06 × 1000 =
  14. 14.466.3 ÷ 10 =
  15. 15.44.11 × 1000 =
  16. 16.36.78 × 10 =
  17. 17.49.58 × 10 =
  18. 18.224.9 × 1000 =
  19. 19.426.1 ÷ 10 =
  20. 20.42.83 × 100 =
  21. 21.28.27 ÷ 10 =
  22. 22.91.8 ÷ 1000 =
  23. 23.15.85 ÷ 100 =
  24. 24.44.1 ÷ 10 =
  25. 25.5.76 ÷ 100 =
  26. 26.31.8 × 1000 =
  27. 27.258.8 ÷ 100 =
  28. 28.19.66 × 10 =
  29. 29.39.64 ÷ 100 =
  30. 30.40.55 ÷ 1000 =
  31. 31.14.71 ÷ 10 =
  32. 32.61.1 ÷ 1000 =
  33. 33.45.51 ÷ 100 =
  34. 34.207.4 ÷ 1000 =
  35. 35.16.54 × 10 =
  36. 36.10.52 × 1000 =
  37. 37.370.8 ÷ 100 =
  38. 38.27.7 × 100 =
  39. 39.47.43 × 100 =
  40. 40.287.5 × 10 =

Answer key

  1. 3.415
  2. 2.61
  3. 0.2419
  4. 3988
  5. 4.068
  6. 0.3985
  7. 159.1
  8. 40.44
  9. 41090
  10. 813
  11. 0.485
  12. 0.4379
  13. 19060
  14. 46.63
  15. 44110
  16. 367.8
  17. 495.8
  18. 224900
  19. 42.61
  20. 4283
  21. 2.827
  22. 0.0918
  23. 0.1585
  24. 4.41
  25. 0.0576
  26. 31800
  27. 2.588
  28. 196.6
  29. 0.3964
  30. 0.04055
  31. 1.471
  32. 0.0611
  33. 0.4551
  34. 0.2074
  35. 165.4
  36. 10520
  37. 3.708
  38. 2770
  39. 4743
  40. 2875

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