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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 99 · 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. 1.20.99 × 100 =
  2. 2.33.25 ÷ 10 =
  3. 3.2.99 × 1000 =
  4. 4.355.1 ÷ 10 =
  5. 5.14.21 × 10 =
  6. 6.61.4 × 10 =
  7. 7.348.8 × 10 =
  8. 8.145.1 ÷ 10 =
  9. 9.99.7 ÷ 10 =
  10. 10.12.04 × 10 =
  11. 11.36.13 × 10 =
  12. 12.47.64 ÷ 100 =
  13. 13.0.38 × 10 =
  14. 14.9.41 ÷ 10 =
  15. 15.42.71 × 10 =
  16. 16.77.9 ÷ 100 =
  17. 17.3.19 ÷ 10 =
  18. 18.16.32 × 10 =
  19. 19.13.74 × 10 =
  20. 20.192.4 ÷ 1000 =
  21. 21.22.54 × 100 =
  22. 22.408.3 ÷ 1000 =
  23. 23.21.49 × 1000 =
  24. 24.49.91 ÷ 100 =
  25. 25.5.54 × 10 =
  26. 26.7.41 × 10 =
  27. 27.46.04 × 100 =
  28. 28.305.4 × 1000 =
  29. 29.16.8 ÷ 10 =
  30. 30.36.67 × 1000 =
  31. 31.261.7 × 100 =
  32. 32.35.13 ÷ 100 =
  33. 33.294.8 ÷ 10 =
  34. 34.217.9 × 100 =
  35. 35.15.88 ÷ 1000 =
  36. 36.36.25 × 10 =
  37. 37.130.2 × 1000 =
  38. 38.42.74 ÷ 10 =
  39. 39.24.63 × 1000 =
  40. 40.49.07 × 1000 =

Answer key

  1. 2099
  2. 3.325
  3. 2990
  4. 35.51
  5. 142.1
  6. 614
  7. 3488
  8. 14.51
  9. 9.97
  10. 120.4
  11. 361.3
  12. 0.4764
  13. 3.8
  14. 0.941
  15. 427.1
  16. 0.779
  17. 0.319
  18. 163.2
  19. 137.4
  20. 0.1924
  21. 2254
  22. 0.4083
  23. 21490
  24. 0.4991
  25. 55.4
  26. 74.1
  27. 4604
  28. 305400
  29. 1.68
  30. 36670
  31. 26170
  32. 0.3513
  33. 29.48
  34. 21790
  35. 0.01588
  36. 362.5
  37. 130200
  38. 4.274
  39. 24630
  40. 49070

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