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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 716 · 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. 1.122.9 × 10 =
  2. 2.226.4 × 10 =
  3. 3.34.31 × 10 =
  4. 4.101.1 × 10 =
  5. 5.40.47 × 10 =
  6. 6.47.47 ÷ 100 =
  7. 7.24.11 × 10 =
  8. 8.33.02 × 10 =
  9. 9.6.7 × 10 =
  10. 10.32.61 × 100 =
  11. 11.484.7 × 1000 =
  12. 12.176.6 ÷ 1000 =
  13. 13.76.6 ÷ 100 =
  14. 14.384.5 × 100 =
  15. 15.19.44 × 100 =
  16. 16.38.35 ÷ 1000 =
  17. 17.267.2 × 10 =
  18. 18.1.53 × 10 =
  19. 19.21.71 × 1000 =
  20. 20.37.98 × 100 =
  21. 21.216.1 × 10 =
  22. 22.413.1 ÷ 10 =
  23. 23.1.52 × 1000 =
  24. 24.296.8 ÷ 100 =
  25. 25.319.7 × 100 =
  26. 26.285.7 × 100 =
  27. 27.6.01 × 10 =
  28. 28.48.03 ÷ 10 =
  29. 29.78.3 ÷ 10 =
  30. 30.393.7 ÷ 100 =
  31. 31.14.51 ÷ 10 =
  32. 32.18.35 × 100 =
  33. 33.8.82 × 10 =
  34. 34.12.85 × 100 =
  35. 35.3.71 ÷ 10 =
  36. 36.471.1 × 10 =
  37. 37.459.4 × 1000 =
  38. 38.196.6 ÷ 1000 =
  39. 39.423.1 ÷ 1000 =
  40. 40.85.2 × 1000 =

Answer key

  1. 1229
  2. 2264
  3. 343.1
  4. 1011
  5. 404.7
  6. 0.4747
  7. 241.1
  8. 330.2
  9. 67
  10. 3261
  11. 484700
  12. 0.1766
  13. 0.766
  14. 38450
  15. 1944
  16. 0.03835
  17. 2672
  18. 15.3
  19. 21710
  20. 3798
  21. 2161
  22. 41.31
  23. 1520
  24. 2.968
  25. 31970
  26. 28570
  27. 60.1
  28. 4.803
  29. 7.83
  30. 3.937
  31. 1.451
  32. 1835
  33. 88.2
  34. 1285
  35. 0.371
  36. 4711
  37. 459400
  38. 0.1966
  39. 0.4231
  40. 85200

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