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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 79 · 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. 1.30.81 ÷ 100 =
  2. 2.96.9 × 100 =
  3. 3.304.5 × 10 =
  4. 4.356.2 ÷ 1000 =
  5. 5.40.19 ÷ 1000 =
  6. 6.7.09 × 1000 =
  7. 7.246.9 ÷ 100 =
  8. 8.43.24 × 10 =
  9. 9.477.6 ÷ 1000 =
  10. 10.3.55 × 1000 =
  11. 11.49.3 × 10 =
  12. 12.76.1 ÷ 10 =
  13. 13.77.1 ÷ 10 =
  14. 14.431.9 ÷ 100 =
  15. 15.39.05 × 10 =
  16. 16.18.27 × 10 =
  17. 17.29.86 × 100 =
  18. 18.48.24 × 1000 =
  19. 19.0.21 ÷ 100 =
  20. 20.29.41 ÷ 1000 =
  21. 21.11.26 ÷ 10 =
  22. 22.360.9 ÷ 1000 =
  23. 23.36.1 × 100 =
  24. 24.138.1 ÷ 10 =
  25. 25.212.3 ÷ 10 =
  26. 26.23.66 ÷ 10 =
  27. 27.67.3 ÷ 1000 =
  28. 28.49.22 × 1000 =
  29. 29.24.12 ÷ 1000 =
  30. 30.203.1 × 1000 =
  31. 31.55.1 × 10 =
  32. 32.15.14 ÷ 1000 =
  33. 33.11.1 × 10 =
  34. 34.434.5 × 1000 =
  35. 35.381.6 ÷ 1000 =
  36. 36.26.76 × 100 =
  37. 37.454.3 × 100 =
  38. 38.4.88 × 100 =
  39. 39.472.2 × 100 =
  40. 40.487.6 ÷ 10 =

Answer key

  1. 0.3081
  2. 9690
  3. 3045
  4. 0.3562
  5. 0.04019
  6. 7090
  7. 2.469
  8. 432.4
  9. 0.4776
  10. 3550
  11. 493
  12. 7.61
  13. 7.71
  14. 4.319
  15. 390.5
  16. 182.7
  17. 2986
  18. 48240
  19. 0.0021
  20. 0.02941
  21. 1.126
  22. 0.3609
  23. 3610
  24. 13.81
  25. 21.23
  26. 2.366
  27. 0.0673
  28. 49220
  29. 0.02412
  30. 203100
  31. 551
  32. 0.01514
  33. 111
  34. 434500
  35. 0.3816
  36. 2676
  37. 45430
  38. 488
  39. 47220
  40. 48.76

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