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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 931 · 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. 1.211.5 × 10 =
  2. 2.40.02 ÷ 10 =
  3. 3.38.39 × 100 =
  4. 4.7.61 ÷ 10 =
  5. 5.332.2 × 100 =
  6. 6.38.78 ÷ 100 =
  7. 7.28.78 ÷ 1000 =
  8. 8.36.71 ÷ 10 =
  9. 9.203.5 × 100 =
  10. 10.39.9 × 1000 =
  11. 11.39.81 × 1000 =
  12. 12.25.24 × 10 =
  13. 13.171.9 ÷ 10 =
  14. 14.16.62 ÷ 10 =
  15. 15.360.4 × 1000 =
  16. 16.6.52 ÷ 10 =
  17. 17.8.61 ÷ 1000 =
  18. 18.15.63 ÷ 1000 =
  19. 19.6.15 ÷ 100 =
  20. 20.9.37 ÷ 10 =
  21. 21.302.5 × 100 =
  22. 22.24.96 ÷ 10 =
  23. 23.331.1 × 10 =
  24. 24.1.44 × 1000 =
  25. 25.269.1 × 10 =
  26. 26.352.2 × 1000 =
  27. 27.172.6 × 1000 =
  28. 28.396.7 × 100 =
  29. 29.422.7 ÷ 10 =
  30. 30.383.1 ÷ 1000 =
  31. 31.41.75 ÷ 10 =
  32. 32.2.93 ÷ 100 =
  33. 33.25.02 × 10 =
  34. 34.109.1 ÷ 1000 =
  35. 35.379.5 × 10 =
  36. 36.48.68 × 1000 =
  37. 37.68.6 × 10 =
  38. 38.445.2 ÷ 10 =
  39. 39.3.54 ÷ 10 =
  40. 40.15.51 × 10 =

Answer key

  1. 2115
  2. 4.002
  3. 3839
  4. 0.761
  5. 33220
  6. 0.3878
  7. 0.02878
  8. 3.671
  9. 20350
  10. 39900
  11. 39810
  12. 252.4
  13. 17.19
  14. 1.662
  15. 360400
  16. 0.652
  17. 0.00861
  18. 0.01563
  19. 0.0615
  20. 0.937
  21. 30250
  22. 2.496
  23. 3311
  24. 1440
  25. 2691
  26. 352200
  27. 172600
  28. 39670
  29. 42.27
  30. 0.3831
  31. 4.175
  32. 0.0293
  33. 250.2
  34. 0.1091
  35. 3795
  36. 48680
  37. 686
  38. 44.52
  39. 0.354
  40. 155.1

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