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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 446 · 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. 1.222.5 × 10 =
  2. 2.169.6 ÷ 100 =
  3. 3.0.85 ÷ 100 =
  4. 4.111.1 ÷ 1000 =
  5. 5.35.86 × 10 =
  6. 6.1.02 × 10 =
  7. 7.342.2 ÷ 1000 =
  8. 8.129.9 × 1000 =
  9. 9.472.9 ÷ 100 =
  10. 10.265.9 ÷ 100 =
  11. 11.25.41 × 100 =
  12. 12.17.42 ÷ 100 =
  13. 13.289.6 ÷ 10 =
  14. 14.127.1 × 1000 =
  15. 15.26.06 ÷ 100 =
  16. 16.5.38 × 1000 =
  17. 17.3.13 × 10 =
  18. 18.7.61 × 10 =
  19. 19.52.7 ÷ 10 =
  20. 20.23.64 ÷ 1000 =
  21. 21.250.2 ÷ 100 =
  22. 22.37.16 ÷ 10 =
  23. 23.7.66 × 10 =
  24. 24.130.7 ÷ 10 =
  25. 25.257.3 × 100 =
  26. 26.263.4 ÷ 10 =
  27. 27.473.2 ÷ 10 =
  28. 28.23.41 × 10 =
  29. 29.6.21 × 100 =
  30. 30.23.47 × 10 =
  31. 31.82.4 ÷ 10 =
  32. 32.16.91 × 10 =
  33. 33.103.7 ÷ 10 =
  34. 34.324.5 × 10 =
  35. 35.102.1 ÷ 1000 =
  36. 36.246.8 × 1000 =
  37. 37.36.29 × 10 =
  38. 38.34.08 × 1000 =
  39. 39.23.05 × 100 =
  40. 40.38.45 × 10 =

Answer key

  1. 2225
  2. 1.696
  3. 0.0085
  4. 0.1111
  5. 358.6
  6. 10.2
  7. 0.3422
  8. 129900
  9. 4.729
  10. 2.659
  11. 2541
  12. 0.1742
  13. 28.96
  14. 127100
  15. 0.2606
  16. 5380
  17. 31.3
  18. 76.1
  19. 5.27
  20. 0.02364
  21. 2.502
  22. 3.716
  23. 76.6
  24. 13.07
  25. 25730
  26. 26.34
  27. 47.32
  28. 234.1
  29. 621
  30. 234.7
  31. 8.24
  32. 169.1
  33. 10.37
  34. 3245
  35. 0.1021
  36. 246800
  37. 362.9
  38. 34080
  39. 2305
  40. 384.5

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