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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 991 · 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. 1.31.72 × 10 =
  2. 2.325.3 ÷ 10 =
  3. 3.49.86 ÷ 1000 =
  4. 4.4.97 × 10 =
  5. 5.17.44 ÷ 10 =
  6. 6.42.9 ÷ 100 =
  7. 7.4.7 × 100 =
  8. 8.365.9 ÷ 1000 =
  9. 9.497.4 × 1000 =
  10. 10.35.4 ÷ 100 =
  11. 11.78.6 ÷ 10 =
  12. 12.204.9 × 1000 =
  13. 13.24.66 ÷ 10 =
  14. 14.451.1 ÷ 100 =
  15. 15.462.9 × 10 =
  16. 16.78.6 × 10 =
  17. 17.35.39 × 100 =
  18. 18.449.1 × 100 =
  19. 19.22.78 ÷ 100 =
  20. 20.21.74 × 1000 =
  21. 21.11.96 × 100 =
  22. 22.55.4 × 100 =
  23. 23.171.1 ÷ 1000 =
  24. 24.33.94 ÷ 100 =
  25. 25.140.4 × 1000 =
  26. 26.3.87 × 10 =
  27. 27.0.71 × 100 =
  28. 28.317.2 ÷ 10 =
  29. 29.47.78 × 10 =
  30. 30.82.3 ÷ 1000 =
  31. 31.22.36 × 1000 =
  32. 32.1.45 ÷ 100 =
  33. 33.194.6 × 10 =
  34. 34.23.21 × 10 =
  35. 35.46.35 ÷ 1000 =
  36. 36.311.1 ÷ 100 =
  37. 37.0.25 ÷ 100 =
  38. 38.89.1 × 100 =
  39. 39.430.1 × 1000 =
  40. 40.407.9 ÷ 10 =

Answer key

  1. 317.2
  2. 32.53
  3. 0.04986
  4. 49.7
  5. 1.744
  6. 0.429
  7. 470
  8. 0.3659
  9. 497400
  10. 0.354
  11. 7.86
  12. 204900
  13. 2.466
  14. 4.511
  15. 4629
  16. 786
  17. 3539
  18. 44910
  19. 0.2278
  20. 21740
  21. 1196
  22. 5540
  23. 0.1711
  24. 0.3394
  25. 140400
  26. 38.7
  27. 71
  28. 31.72
  29. 477.8
  30. 0.0823
  31. 22360
  32. 0.0145
  33. 1946
  34. 232.1
  35. 0.04635
  36. 3.111
  37. 0.0025
  38. 8910
  39. 430100
  40. 40.79

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