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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 539 · 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. 1.327.9 × 100 =
  2. 2.10.47 × 10 =
  3. 3.143.8 × 1000 =
  4. 4.5.28 ÷ 10 =
  5. 5.44.91 × 100 =
  6. 6.254.9 ÷ 10 =
  7. 7.8.95 × 10 =
  8. 8.43.37 ÷ 10 =
  9. 9.29.92 ÷ 1000 =
  10. 10.438.1 × 1000 =
  11. 11.246.5 × 100 =
  12. 12.44.2 × 1000 =
  13. 13.18.22 ÷ 10 =
  14. 14.35.64 ÷ 100 =
  15. 15.291.7 ÷ 10 =
  16. 16.459.5 ÷ 1000 =
  17. 17.138.1 × 10 =
  18. 18.167.9 ÷ 10 =
  19. 19.163.4 ÷ 100 =
  20. 20.27.98 × 10 =
  21. 21.157.9 × 100 =
  22. 22.137.1 × 1000 =
  23. 23.33.29 × 100 =
  24. 24.13.06 × 10 =
  25. 25.46.44 × 100 =
  26. 26.10.86 ÷ 1000 =
  27. 27.121.3 × 10 =
  28. 28.327.5 ÷ 10 =
  29. 29.9.7 ÷ 1000 =
  30. 30.306.9 × 10 =
  31. 31.294.1 ÷ 1000 =
  32. 32.133.1 ÷ 10 =
  33. 33.188.9 ÷ 100 =
  34. 34.22.38 × 100 =
  35. 35.186.7 × 10 =
  36. 36.481.2 ÷ 100 =
  37. 37.39.5 × 1000 =
  38. 38.458.5 ÷ 10 =
  39. 39.42.87 × 100 =
  40. 40.28.05 ÷ 1000 =

Answer key

  1. 32790
  2. 104.7
  3. 143800
  4. 0.528
  5. 4491
  6. 25.49
  7. 89.5
  8. 4.337
  9. 0.02992
  10. 438100
  11. 24650
  12. 44200
  13. 1.822
  14. 0.3564
  15. 29.17
  16. 0.4595
  17. 1381
  18. 16.79
  19. 1.634
  20. 279.8
  21. 15790
  22. 137100
  23. 3329
  24. 130.6
  25. 4644
  26. 0.01086
  27. 1213
  28. 32.75
  29. 0.0097
  30. 3069
  31. 0.2941
  32. 13.31
  33. 1.889
  34. 2238
  35. 1867
  36. 4.812
  37. 39500
  38. 45.85
  39. 4287
  40. 0.02805

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