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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 486 · 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. 1.2.12 × 10 =
  2. 2.79.2 ÷ 10 =
  3. 3.279.1 × 100 =
  4. 4.40.12 × 10 =
  5. 5.28.6 ÷ 10 =
  6. 6.410.8 × 1000 =
  7. 7.3.97 × 10 =
  8. 8.23.87 × 10 =
  9. 9.385.8 ÷ 1000 =
  10. 10.129.5 ÷ 1000 =
  11. 11.2.19 × 1000 =
  12. 12.357.1 × 100 =
  13. 13.207.2 × 1000 =
  14. 14.49.62 × 100 =
  15. 15.33.07 × 1000 =
  16. 16.174.5 × 1000 =
  17. 17.13.81 × 100 =
  18. 18.49.2 ÷ 100 =
  19. 19.45.04 × 10 =
  20. 20.497.6 × 1000 =
  21. 21.10.66 ÷ 1000 =
  22. 22.402.5 ÷ 1000 =
  23. 23.446.1 × 1000 =
  24. 24.71.5 × 1000 =
  25. 25.19.94 ÷ 10 =
  26. 26.17.11 × 1000 =
  27. 27.7.19 ÷ 1000 =
  28. 28.168.8 ÷ 10 =
  29. 29.472.7 ÷ 100 =
  30. 30.329.6 × 1000 =
  31. 31.39.41 × 100 =
  32. 32.350.1 ÷ 100 =
  33. 33.12.1 × 1000 =
  34. 34.140.6 × 100 =
  35. 35.12.11 × 1000 =
  36. 36.277.6 × 1000 =
  37. 37.363.9 ÷ 1000 =
  38. 38.8.38 × 1000 =
  39. 39.424.4 × 10 =
  40. 40.474.1 × 1000 =

Answer key

  1. 21.2
  2. 7.92
  3. 27910
  4. 401.2
  5. 2.86
  6. 410800
  7. 39.7
  8. 238.7
  9. 0.3858
  10. 0.1295
  11. 2190
  12. 35710
  13. 207200
  14. 4962
  15. 33070
  16. 174500
  17. 1381
  18. 0.492
  19. 450.4
  20. 497600
  21. 0.01066
  22. 0.4025
  23. 446100
  24. 71500
  25. 1.994
  26. 17110
  27. 0.00719
  28. 16.88
  29. 4.727
  30. 329600
  31. 3941
  32. 3.501
  33. 12100
  34. 14060
  35. 12110
  36. 277600
  37. 0.3639
  38. 8380
  39. 4244
  40. 474100

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