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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 317 · 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. 1.102.1 × 1000 =
  2. 2.191.3 × 100 =
  3. 3.50.6 × 10 =
  4. 4.330.1 × 100 =
  5. 5.153.6 × 1000 =
  6. 6.253.5 × 10 =
  7. 7.5.86 × 10 =
  8. 8.411.7 ÷ 100 =
  9. 9.16.16 × 100 =
  10. 10.16.02 ÷ 1000 =
  11. 11.278.2 ÷ 10 =
  12. 12.294.5 ÷ 100 =
  13. 13.49.1 ÷ 100 =
  14. 14.35.09 × 100 =
  15. 15.418.6 × 100 =
  16. 16.407.1 × 10 =
  17. 17.39.43 × 1000 =
  18. 18.35.33 ÷ 1000 =
  19. 19.5.81 × 100 =
  20. 20.243.1 ÷ 10 =
  21. 21.123.5 ÷ 1000 =
  22. 22.18.12 × 1000 =
  23. 23.14.8 ÷ 1000 =
  24. 24.38.1 ÷ 1000 =
  25. 25.472.5 × 100 =
  26. 26.25.79 × 10 =
  27. 27.18.28 × 100 =
  28. 28.83.6 ÷ 10 =
  29. 29.166.7 × 10 =
  30. 30.102.9 × 10 =
  31. 31.417.2 × 100 =
  32. 32.429.5 ÷ 1000 =
  33. 33.378.5 ÷ 100 =
  34. 34.19.89 ÷ 10 =
  35. 35.330.7 ÷ 100 =
  36. 36.18.15 × 10 =
  37. 37.245.3 × 10 =
  38. 38.32.09 ÷ 100 =
  39. 39.252.6 ÷ 10 =
  40. 40.48.41 × 1000 =

Answer key

  1. 102100
  2. 19130
  3. 506
  4. 33010
  5. 153600
  6. 2535
  7. 58.6
  8. 4.117
  9. 1616
  10. 0.01602
  11. 27.82
  12. 2.945
  13. 0.491
  14. 3509
  15. 41860
  16. 4071
  17. 39430
  18. 0.03533
  19. 581
  20. 24.31
  21. 0.1235
  22. 18120
  23. 0.0148
  24. 0.0381
  25. 47250
  26. 257.9
  27. 1828
  28. 8.36
  29. 1667
  30. 1029
  31. 41720
  32. 0.4295
  33. 3.785
  34. 1.989
  35. 3.307
  36. 181.5
  37. 2453
  38. 0.3209
  39. 25.26
  40. 48410

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