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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 772 · 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. 1.42.72 × 1000 =
  2. 2.39.81 ÷ 10 =
  3. 3.377.6 ÷ 10 =
  4. 4.96.2 ÷ 10 =
  5. 5.487.7 ÷ 100 =
  6. 6.486.1 ÷ 100 =
  7. 7.463.7 ÷ 1000 =
  8. 8.39.98 ÷ 1000 =
  9. 9.497.4 × 100 =
  10. 10.27.28 × 100 =
  11. 11.358.4 ÷ 1000 =
  12. 12.11.58 × 10 =
  13. 13.16.71 × 100 =
  14. 14.20.46 × 1000 =
  15. 15.41.6 × 10 =
  16. 16.105.8 × 100 =
  17. 17.458.1 × 100 =
  18. 18.94.2 × 1000 =
  19. 19.12.2 ÷ 1000 =
  20. 20.133.3 ÷ 100 =
  21. 21.120.5 × 10 =
  22. 22.466.1 ÷ 100 =
  23. 23.258.1 × 1000 =
  24. 24.488.7 × 10 =
  25. 25.27.91 ÷ 100 =
  26. 26.21.72 × 1000 =
  27. 27.488.4 ÷ 1000 =
  28. 28.285.2 × 10 =
  29. 29.14.54 ÷ 10 =
  30. 30.27.13 × 1000 =
  31. 31.23.6 × 1000 =
  32. 32.33.77 ÷ 100 =
  33. 33.413.6 × 100 =
  34. 34.31.91 × 1000 =
  35. 35.17.51 ÷ 10 =
  36. 36.200.7 ÷ 1000 =
  37. 37.325.6 ÷ 1000 =
  38. 38.470.8 ÷ 10 =
  39. 39.291.2 × 1000 =
  40. 40.4.93 × 1000 =

Answer key

  1. 42720
  2. 3.981
  3. 37.76
  4. 9.62
  5. 4.877
  6. 4.861
  7. 0.4637
  8. 0.03998
  9. 49740
  10. 2728
  11. 0.3584
  12. 115.8
  13. 1671
  14. 20460
  15. 416
  16. 10580
  17. 45810
  18. 94200
  19. 0.0122
  20. 1.333
  21. 1205
  22. 4.661
  23. 258100
  24. 4887
  25. 0.2791
  26. 21720
  27. 0.4884
  28. 2852
  29. 1.454
  30. 27130
  31. 23600
  32. 0.3377
  33. 41360
  34. 31910
  35. 1.751
  36. 0.2007
  37. 0.3256
  38. 47.08
  39. 291200
  40. 4930

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