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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 450 · 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. 1.5.15 ÷ 10 =
  2. 2.18.71 × 10 =
  3. 3.131.8 ÷ 1000 =
  4. 4.400.1 × 100 =
  5. 5.123.4 ÷ 10 =
  6. 6.152.7 ÷ 10 =
  7. 7.3.13 × 1000 =
  8. 8.353.1 × 1000 =
  9. 9.312.5 ÷ 100 =
  10. 10.441.2 ÷ 10 =
  11. 11.297.7 ÷ 10 =
  12. 12.20.78 ÷ 10 =
  13. 13.209.7 ÷ 10 =
  14. 14.46.3 ÷ 100 =
  15. 15.39.52 ÷ 1000 =
  16. 16.16.3 ÷ 100 =
  17. 17.460.1 × 100 =
  18. 18.42.01 × 100 =
  19. 19.401.8 × 1000 =
  20. 20.25.6 × 100 =
  21. 21.66.1 ÷ 100 =
  22. 22.10.84 × 10 =
  23. 23.46.71 ÷ 100 =
  24. 24.325.1 × 100 =
  25. 25.107.7 × 10 =
  26. 26.23.06 × 1000 =
  27. 27.68.8 ÷ 10 =
  28. 28.350.7 ÷ 10 =
  29. 29.14.91 ÷ 10 =
  30. 30.27.37 × 1000 =
  31. 31.344.7 × 10 =
  32. 32.8.25 ÷ 1000 =
  33. 33.13.37 × 10 =
  34. 34.17.11 × 10 =
  35. 35.465.8 × 100 =
  36. 36.13.28 × 1000 =
  37. 37.358.3 × 1000 =
  38. 38.40.88 ÷ 10 =
  39. 39.33.87 ÷ 100 =
  40. 40.6.91 × 100 =

Answer key

  1. 0.515
  2. 187.1
  3. 0.1318
  4. 40010
  5. 12.34
  6. 15.27
  7. 3130
  8. 353100
  9. 3.125
  10. 44.12
  11. 29.77
  12. 2.078
  13. 20.97
  14. 0.463
  15. 0.03952
  16. 0.163
  17. 46010
  18. 4201
  19. 401800
  20. 2560
  21. 0.661
  22. 108.4
  23. 0.4671
  24. 32510
  25. 1077
  26. 23060
  27. 6.88
  28. 35.07
  29. 1.491
  30. 27370
  31. 3447
  32. 0.00825
  33. 133.7
  34. 171.1
  35. 46580
  36. 13280
  37. 358300
  38. 4.088
  39. 0.3387
  40. 691

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