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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 854 · 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. 1.339.1 × 100 =
  2. 2.4.36 × 10 =
  3. 3.103.8 × 100 =
  4. 4.38.98 × 100 =
  5. 5.432.1 × 100 =
  6. 6.71.6 × 100 =
  7. 7.86.8 ÷ 100 =
  8. 8.213.9 ÷ 100 =
  9. 9.48.32 ÷ 1000 =
  10. 10.5.17 ÷ 1000 =
  11. 11.426.6 × 100 =
  12. 12.390.2 ÷ 100 =
  13. 13.14.66 × 1000 =
  14. 14.239.4 × 10 =
  15. 15.252.8 × 1000 =
  16. 16.445.4 ÷ 1000 =
  17. 17.28.52 × 100 =
  18. 18.21.32 × 10 =
  19. 19.7.21 ÷ 1000 =
  20. 20.0.23 × 100 =
  21. 21.251.4 ÷ 1000 =
  22. 22.286.5 ÷ 1000 =
  23. 23.46.95 × 10 =
  24. 24.43.57 ÷ 100 =
  25. 25.141.4 ÷ 100 =
  26. 26.402.1 × 100 =
  27. 27.358.1 ÷ 1000 =
  28. 28.9.01 × 10 =
  29. 29.238.4 × 10 =
  30. 30.338.5 ÷ 100 =
  31. 31.6.41 ÷ 1000 =
  32. 32.18.47 × 1000 =
  33. 33.27.37 × 10 =
  34. 34.49.03 × 100 =
  35. 35.286.1 ÷ 1000 =
  36. 36.19.26 ÷ 1000 =
  37. 37.6.91 × 100 =
  38. 38.18.09 × 100 =
  39. 39.38.59 ÷ 100 =
  40. 40.4.13 × 100 =

Answer key

  1. 33910
  2. 43.6
  3. 10380
  4. 3898
  5. 43210
  6. 7160
  7. 0.868
  8. 2.139
  9. 0.04832
  10. 0.00517
  11. 42660
  12. 3.902
  13. 14660
  14. 2394
  15. 252800
  16. 0.4454
  17. 2852
  18. 213.2
  19. 0.00721
  20. 23
  21. 0.2514
  22. 0.2865
  23. 469.5
  24. 0.4357
  25. 1.414
  26. 40210
  27. 0.3581
  28. 90.1
  29. 2384
  30. 3.385
  31. 0.00641
  32. 18470
  33. 273.7
  34. 4903
  35. 0.2861
  36. 0.01926
  37. 691
  38. 1809
  39. 0.3859
  40. 413

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