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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 762 · 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. 1.7.25 × 100 =
  2. 2.4.28 ÷ 10 =
  3. 3.171.2 ÷ 1000 =
  4. 4.23.51 ÷ 100 =
  5. 5.12.75 ÷ 100 =
  6. 6.49.25 × 100 =
  7. 7.23.2 ÷ 10 =
  8. 8.207.4 × 100 =
  9. 9.85.6 × 100 =
  10. 10.66.7 × 10 =
  11. 11.152.9 × 100 =
  12. 12.490.7 × 10 =
  13. 13.21.01 ÷ 10 =
  14. 14.128.2 × 1000 =
  15. 15.460.4 ÷ 100 =
  16. 16.254.3 ÷ 10 =
  17. 17.29.2 ÷ 100 =
  18. 18.106.9 ÷ 1000 =
  19. 19.290.8 ÷ 100 =
  20. 20.41.79 × 100 =
  21. 21.4.44 × 1000 =
  22. 22.31.56 ÷ 10 =
  23. 23.49.04 ÷ 10 =
  24. 24.51.2 ÷ 1000 =
  25. 25.9.12 × 1000 =
  26. 26.87.1 × 1000 =
  27. 27.0.65 ÷ 1000 =
  28. 28.27.79 × 100 =
  29. 29.5.78 ÷ 100 =
  30. 30.46.91 × 10 =
  31. 31.6.23 × 100 =
  32. 32.124.1 ÷ 100 =
  33. 33.38.88 ÷ 10 =
  34. 34.39.67 × 1000 =
  35. 35.29.12 × 1000 =
  36. 36.34.59 × 100 =
  37. 37.92.2 × 1000 =
  38. 38.2.69 ÷ 1000 =
  39. 39.410.6 ÷ 1000 =
  40. 40.47.71 ÷ 1000 =

Answer key

  1. 725
  2. 0.428
  3. 0.1712
  4. 0.2351
  5. 0.1275
  6. 4925
  7. 2.32
  8. 20740
  9. 8560
  10. 667
  11. 15290
  12. 4907
  13. 2.101
  14. 128200
  15. 4.604
  16. 25.43
  17. 0.292
  18. 0.1069
  19. 2.908
  20. 4179
  21. 4440
  22. 3.156
  23. 4.904
  24. 0.0512
  25. 9120
  26. 87100
  27. 0.00065
  28. 2779
  29. 0.0578
  30. 469.1
  31. 623
  32. 1.241
  33. 3.888
  34. 39670
  35. 29120
  36. 3459
  37. 92200
  38. 0.00269
  39. 0.4106
  40. 0.04771

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