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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 54 · 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. 1.393.9 × 100 =
  2. 2.155.1 × 100 =
  3. 3.413.1 × 10 =
  4. 4.177.9 × 100 =
  5. 5.31.67 × 100 =
  6. 6.31.83 ÷ 100 =
  7. 7.339.1 ÷ 10 =
  8. 8.263.4 × 10 =
  9. 9.1.33 ÷ 10 =
  10. 10.310.1 × 1000 =
  11. 11.383.2 × 10 =
  12. 12.39.97 × 10 =
  13. 13.394.1 ÷ 1000 =
  14. 14.361.4 ÷ 100 =
  15. 15.30.76 ÷ 10 =
  16. 16.370.9 ÷ 10 =
  17. 17.44.5 × 100 =
  18. 18.63.5 ÷ 100 =
  19. 19.29.14 ÷ 100 =
  20. 20.216.1 × 1000 =
  21. 21.3.11 × 1000 =
  22. 22.344.9 ÷ 10 =
  23. 23.49.63 × 10 =
  24. 24.113.8 ÷ 10 =
  25. 25.282.7 ÷ 1000 =
  26. 26.84.9 × 10 =
  27. 27.13.84 ÷ 100 =
  28. 28.19.71 × 100 =
  29. 29.392.5 × 100 =
  30. 30.174.1 × 10 =
  31. 31.10.74 × 1000 =
  32. 32.46.69 ÷ 10 =
  33. 33.44.66 × 1000 =
  34. 34.31.25 ÷ 10 =
  35. 35.28.48 ÷ 100 =
  36. 36.135.9 × 1000 =
  37. 37.263.7 ÷ 100 =
  38. 38.463.1 ÷ 100 =
  39. 39.7.61 ÷ 10 =
  40. 40.5.46 × 1000 =

Answer key

  1. 39390
  2. 15510
  3. 4131
  4. 17790
  5. 3167
  6. 0.3183
  7. 33.91
  8. 2634
  9. 0.133
  10. 310100
  11. 3832
  12. 399.7
  13. 0.3941
  14. 3.614
  15. 3.076
  16. 37.09
  17. 4450
  18. 0.635
  19. 0.2914
  20. 216100
  21. 3110
  22. 34.49
  23. 496.3
  24. 11.38
  25. 0.2827
  26. 849
  27. 0.1384
  28. 1971
  29. 39250
  30. 1741
  31. 10740
  32. 4.669
  33. 44660
  34. 3.125
  35. 0.2848
  36. 135900
  37. 2.637
  38. 4.631
  39. 0.761
  40. 5460

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