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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 649 · 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. 1.424.3 × 100 =
  2. 2.392.9 × 1000 =
  3. 3.20.2 × 100 =
  4. 4.21.25 ÷ 100 =
  5. 5.59.4 × 100 =
  6. 6.9.89 × 10 =
  7. 7.25.87 × 10 =
  8. 8.2.11 ÷ 100 =
  9. 9.24.98 ÷ 10 =
  10. 10.250.4 ÷ 10 =
  11. 11.439.5 × 10 =
  12. 12.177.9 × 1000 =
  13. 13.497.9 ÷ 100 =
  14. 14.109.7 × 10 =
  15. 15.27.41 × 10 =
  16. 16.237.1 × 10 =
  17. 17.42.87 × 1000 =
  18. 18.464.5 × 1000 =
  19. 19.332.6 ÷ 100 =
  20. 20.490.5 × 100 =
  21. 21.7.19 × 10 =
  22. 22.316.9 ÷ 10 =
  23. 23.486.8 ÷ 100 =
  24. 24.8.63 × 100 =
  25. 25.246.5 × 100 =
  26. 26.79.5 × 100 =
  27. 27.39.87 ÷ 10 =
  28. 28.2.91 × 100 =
  29. 29.146.1 × 10 =
  30. 30.160.1 ÷ 1000 =
  31. 31.273.1 × 1000 =
  32. 32.351.8 ÷ 10 =
  33. 33.29.7 × 10 =
  34. 34.81.9 × 1000 =
  35. 35.42.65 × 10 =
  36. 36.0.79 ÷ 10 =
  37. 37.278.1 × 1000 =
  38. 38.3.08 ÷ 10 =
  39. 39.7.95 ÷ 1000 =
  40. 40.455.7 ÷ 100 =

Answer key

  1. 42430
  2. 392900
  3. 2020
  4. 0.2125
  5. 5940
  6. 98.9
  7. 258.7
  8. 0.0211
  9. 2.498
  10. 25.04
  11. 4395
  12. 177900
  13. 4.979
  14. 1097
  15. 274.1
  16. 2371
  17. 42870
  18. 464500
  19. 3.326
  20. 49050
  21. 71.9
  22. 31.69
  23. 4.868
  24. 863
  25. 24650
  26. 7950
  27. 3.987
  28. 291
  29. 1461
  30. 0.1601
  31. 273100
  32. 35.18
  33. 297
  34. 81900
  35. 426.5
  36. 0.079
  37. 278100
  38. 0.308
  39. 0.00795
  40. 4.557

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