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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 655 · 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. 1.123.1 × 10 =
  2. 2.202.7 ÷ 100 =
  3. 3.347.1 ÷ 10 =
  4. 4.20.29 ÷ 1000 =
  5. 5.465.1 ÷ 1000 =
  6. 6.8.51 × 100 =
  7. 7.35.73 ÷ 100 =
  8. 8.82.3 × 1000 =
  9. 9.86.2 × 10 =
  10. 10.39.1 ÷ 100 =
  11. 11.428.7 × 1000 =
  12. 12.25.42 × 100 =
  13. 13.257.1 ÷ 10 =
  14. 14.335.2 ÷ 10 =
  15. 15.26.16 ÷ 1000 =
  16. 16.36.44 × 1000 =
  17. 17.43.01 ÷ 10 =
  18. 18.250.6 ÷ 100 =
  19. 19.106.7 ÷ 1000 =
  20. 20.37.14 ÷ 100 =
  21. 21.234.8 ÷ 10 =
  22. 22.366.1 ÷ 10 =
  23. 23.367.1 ÷ 100 =
  24. 24.387.8 ÷ 100 =
  25. 25.399.5 ÷ 1000 =
  26. 26.49.47 × 100 =
  27. 27.3.8 × 1000 =
  28. 28.67.6 ÷ 10 =
  29. 29.232.7 × 1000 =
  30. 30.11.91 × 10 =
  31. 31.381.9 × 100 =
  32. 32.9.85 × 100 =
  33. 33.15.79 × 100 =
  34. 34.2.13 × 100 =
  35. 35.9.48 ÷ 100 =
  36. 36.291.1 ÷ 10 =
  37. 37.33.68 × 10 =
  38. 38.15.89 × 100 =
  39. 39.44.78 ÷ 100 =
  40. 40.206.6 × 10 =

Answer key

  1. 1231
  2. 2.027
  3. 34.71
  4. 0.02029
  5. 0.4651
  6. 851
  7. 0.3573
  8. 82300
  9. 862
  10. 0.391
  11. 428700
  12. 2542
  13. 25.71
  14. 33.52
  15. 0.02616
  16. 36440
  17. 4.301
  18. 2.506
  19. 0.1067
  20. 0.3714
  21. 23.48
  22. 36.61
  23. 3.671
  24. 3.878
  25. 0.3995
  26. 4947
  27. 3800
  28. 6.76
  29. 232700
  30. 119.1
  31. 38190
  32. 985
  33. 1579
  34. 213
  35. 0.0948
  36. 29.11
  37. 336.8
  38. 1589
  39. 0.4478
  40. 2066

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