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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 867 · 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. 1.25.78 × 100 =
  2. 2.216.2 ÷ 1000 =
  3. 3.2.64 × 10 =
  4. 4.49.45 × 10 =
  5. 5.10.33 ÷ 100 =
  6. 6.291.5 ÷ 10 =
  7. 7.233.8 × 1000 =
  8. 8.10.86 × 100 =
  9. 9.31.14 × 100 =
  10. 10.40.63 ÷ 1000 =
  11. 11.408.4 ÷ 1000 =
  12. 12.216.9 ÷ 10 =
  13. 13.12.45 × 100 =
  14. 14.431.5 × 10 =
  15. 15.300.5 × 1000 =
  16. 16.156.2 ÷ 10 =
  17. 17.14.51 × 100 =
  18. 18.23.21 ÷ 10 =
  19. 19.7.21 ÷ 1000 =
  20. 20.6.53 ÷ 10 =
  21. 21.299.8 × 10 =
  22. 22.45.23 ÷ 10 =
  23. 23.344.2 × 1000 =
  24. 24.80.2 × 100 =
  25. 25.71.4 × 1000 =
  26. 26.34.62 ÷ 1000 =
  27. 27.40.25 × 100 =
  28. 28.18.98 × 10 =
  29. 29.40.87 × 10 =
  30. 30.104.6 ÷ 100 =
  31. 31.291.6 ÷ 1000 =
  32. 32.29.56 ÷ 10 =
  33. 33.304.2 ÷ 100 =
  34. 34.46.67 ÷ 1000 =
  35. 35.1.19 ÷ 100 =
  36. 36.397.7 ÷ 10 =
  37. 37.19.41 ÷ 100 =
  38. 38.19.5 × 100 =
  39. 39.9.84 × 10 =
  40. 40.77.7 × 100 =

Answer key

  1. 2578
  2. 0.2162
  3. 26.4
  4. 494.5
  5. 0.1033
  6. 29.15
  7. 233800
  8. 1086
  9. 3114
  10. 0.04063
  11. 0.4084
  12. 21.69
  13. 1245
  14. 4315
  15. 300500
  16. 15.62
  17. 1451
  18. 2.321
  19. 0.00721
  20. 0.653
  21. 2998
  22. 4.523
  23. 344200
  24. 8020
  25. 71400
  26. 0.03462
  27. 4025
  28. 189.8
  29. 408.7
  30. 1.046
  31. 0.2916
  32. 2.956
  33. 3.042
  34. 0.04667
  35. 0.0119
  36. 39.77
  37. 0.1941
  38. 1950
  39. 98.4
  40. 7770

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