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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 978 · 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. 1.424.2 ÷ 10 =
  2. 2.179.4 × 1000 =
  3. 3.208.1 × 100 =
  4. 4.99.7 × 100 =
  5. 5.24.23 ÷ 1000 =
  6. 6.342.6 ÷ 1000 =
  7. 7.87.4 × 100 =
  8. 8.341.3 ÷ 1000 =
  9. 9.452.9 ÷ 1000 =
  10. 10.268.7 × 100 =
  11. 11.24.1 × 10 =
  12. 12.4.1 × 10 =
  13. 13.15.71 ÷ 10 =
  14. 14.38.25 ÷ 10 =
  15. 15.2.71 ÷ 1000 =
  16. 16.6.84 ÷ 10 =
  17. 17.39.87 ÷ 100 =
  18. 18.268.3 × 10 =
  19. 19.425.5 ÷ 100 =
  20. 20.24.01 × 1000 =
  21. 21.385.5 ÷ 100 =
  22. 22.63.8 × 1000 =
  23. 23.426.1 ÷ 100 =
  24. 24.93.3 × 100 =
  25. 25.61.1 ÷ 100 =
  26. 26.114.1 × 1000 =
  27. 27.48.01 ÷ 10 =
  28. 28.45.81 ÷ 10 =
  29. 29.25.06 ÷ 100 =
  30. 30.4.96 ÷ 1000 =
  31. 31.308.1 × 10 =
  32. 32.260.7 × 10 =
  33. 33.45.11 × 10 =
  34. 34.442.6 × 100 =
  35. 35.7.37 × 10 =
  36. 36.388.6 × 1000 =
  37. 37.3.75 ÷ 10 =
  38. 38.490.9 × 100 =
  39. 39.47.52 ÷ 1000 =
  40. 40.419.9 × 1000 =

Answer key

  1. 42.42
  2. 179400
  3. 20810
  4. 9970
  5. 0.02423
  6. 0.3426
  7. 8740
  8. 0.3413
  9. 0.4529
  10. 26870
  11. 241
  12. 41
  13. 1.571
  14. 3.825
  15. 0.00271
  16. 0.684
  17. 0.3987
  18. 2683
  19. 4.255
  20. 24010
  21. 3.855
  22. 63800
  23. 4.261
  24. 9330
  25. 0.611
  26. 114100
  27. 4.801
  28. 4.581
  29. 0.2506
  30. 0.00496
  31. 3081
  32. 2607
  33. 451.1
  34. 44260
  35. 73.7
  36. 388600
  37. 0.375
  38. 49090
  39. 0.04752
  40. 419900

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