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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 310 · 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. 1.41.08 × 10 =
  2. 2.29.36 ÷ 100 =
  3. 3.0.75 ÷ 100 =
  4. 4.7.78 × 1000 =
  5. 5.401.9 × 10 =
  6. 6.43.2 × 100 =
  7. 7.43.51 × 100 =
  8. 8.21.31 ÷ 10 =
  9. 9.444.1 × 100 =
  10. 10.13.86 ÷ 100 =
  11. 11.8.72 × 100 =
  12. 12.48.81 ÷ 10 =
  13. 13.278.5 ÷ 10 =
  14. 14.483.7 ÷ 100 =
  15. 15.32.98 ÷ 100 =
  16. 16.115.6 × 100 =
  17. 17.310.7 × 100 =
  18. 18.25.66 ÷ 1000 =
  19. 19.27.71 ÷ 100 =
  20. 20.484.8 ÷ 1000 =
  21. 21.67.8 ÷ 1000 =
  22. 22.498.1 × 10 =
  23. 23.386.1 ÷ 100 =
  24. 24.3.18 ÷ 10 =
  25. 25.206.6 ÷ 100 =
  26. 26.109.4 × 10 =
  27. 27.360.4 × 100 =
  28. 28.61.6 ÷ 10 =
  29. 29.42.84 × 1000 =
  30. 30.245.1 × 10 =
  31. 31.407.9 ÷ 10 =
  32. 32.405.2 ÷ 10 =
  33. 33.45.42 ÷ 10 =
  34. 34.151.5 ÷ 1000 =
  35. 35.10.6 × 100 =
  36. 36.103.3 ÷ 10 =
  37. 37.41.52 ÷ 100 =
  38. 38.21.68 ÷ 1000 =
  39. 39.38.48 ÷ 100 =
  40. 40.112.3 ÷ 100 =

Answer key

  1. 410.8
  2. 0.2936
  3. 0.0075
  4. 7780
  5. 4019
  6. 4320
  7. 4351
  8. 2.131
  9. 44410
  10. 0.1386
  11. 872
  12. 4.881
  13. 27.85
  14. 4.837
  15. 0.3298
  16. 11560
  17. 31070
  18. 0.02566
  19. 0.2771
  20. 0.4848
  21. 0.0678
  22. 4981
  23. 3.861
  24. 0.318
  25. 2.066
  26. 1094
  27. 36040
  28. 6.16
  29. 42840
  30. 2451
  31. 40.79
  32. 40.52
  33. 4.542
  34. 0.1515
  35. 1060
  36. 10.33
  37. 0.4152
  38. 0.02168
  39. 0.3848
  40. 1.123

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