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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 81 · 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. 1.384.1 × 10 =
  2. 2.38.92 × 10 =
  3. 3.442.7 ÷ 10 =
  4. 4.70.5 ÷ 10 =
  5. 5.45.51 × 10 =
  6. 6.338.1 × 1000 =
  7. 7.252.4 ÷ 1000 =
  8. 8.31.05 ÷ 1000 =
  9. 9.28.74 × 1000 =
  10. 10.96.4 × 1000 =
  11. 11.384.4 × 10 =
  12. 12.12.35 × 10 =
  13. 13.1.42 × 1000 =
  14. 14.32.11 × 10 =
  15. 15.21.84 ÷ 100 =
  16. 16.2.24 ÷ 1000 =
  17. 17.89.5 ÷ 10 =
  18. 18.40.19 ÷ 10 =
  19. 19.37.75 ÷ 1000 =
  20. 20.18.58 × 10 =
  21. 21.256.8 × 1000 =
  22. 22.384.4 × 1000 =
  23. 23.45.39 × 1000 =
  24. 24.26.25 × 100 =
  25. 25.39.8 × 10 =
  26. 26.6.81 ÷ 100 =
  27. 27.216.2 × 10 =
  28. 28.38.83 × 1000 =
  29. 29.0.95 ÷ 10 =
  30. 30.27.21 ÷ 10 =
  31. 31.104.2 × 100 =
  32. 32.8.56 × 100 =
  33. 33.180.1 ÷ 100 =
  34. 34.221.7 × 100 =
  35. 35.27.3 × 10 =
  36. 36.222.5 ÷ 1000 =
  37. 37.33.41 × 100 =
  38. 38.35.72 ÷ 10 =
  39. 39.334.1 ÷ 1000 =
  40. 40.490.9 ÷ 100 =

Answer key

  1. 3841
  2. 389.2
  3. 44.27
  4. 7.05
  5. 455.1
  6. 338100
  7. 0.2524
  8. 0.03105
  9. 28740
  10. 96400
  11. 3844
  12. 123.5
  13. 1420
  14. 321.1
  15. 0.2184
  16. 0.00224
  17. 8.95
  18. 4.019
  19. 0.03775
  20. 185.8
  21. 256800
  22. 384400
  23. 45390
  24. 2625
  25. 398
  26. 0.0681
  27. 2162
  28. 38830
  29. 0.095
  30. 2.721
  31. 10420
  32. 856
  33. 1.801
  34. 22170
  35. 273
  36. 0.2225
  37. 3341
  38. 3.572
  39. 0.3341
  40. 4.909

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