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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 948 · 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. 1.421.1 × 1000 =
  2. 2.205.5 × 1000 =
  3. 3.261.9 ÷ 10 =
  4. 4.33.92 ÷ 100 =
  5. 5.10.62 ÷ 1000 =
  6. 6.47.58 ÷ 100 =
  7. 7.221.9 × 1000 =
  8. 8.38.12 × 100 =
  9. 9.455.6 × 1000 =
  10. 10.137.1 × 100 =
  11. 11.20.74 × 1000 =
  12. 12.4.31 ÷ 10 =
  13. 13.433.6 ÷ 10 =
  14. 14.14.2 × 1000 =
  15. 15.22.82 × 1000 =
  16. 16.37.33 ÷ 1000 =
  17. 17.136.1 × 10 =
  18. 18.173.1 × 1000 =
  19. 19.12.84 ÷ 10 =
  20. 20.14.47 × 100 =
  21. 21.4.41 ÷ 10 =
  22. 22.266.6 ÷ 100 =
  23. 23.45.41 ÷ 100 =
  24. 24.41.71 × 100 =
  25. 25.36.95 ÷ 1000 =
  26. 26.298.5 × 1000 =
  27. 27.22.36 ÷ 100 =
  28. 28.7.92 × 10 =
  29. 29.44.7 ÷ 100 =
  30. 30.317.8 ÷ 10 =
  31. 31.25.79 ÷ 100 =
  32. 32.369.9 × 1000 =
  33. 33.15.82 × 1000 =
  34. 34.16.43 × 10 =
  35. 35.179.2 ÷ 100 =
  36. 36.10.09 ÷ 1000 =
  37. 37.37.25 ÷ 10 =
  38. 38.11.01 × 10 =
  39. 39.463.8 ÷ 1000 =
  40. 40.343.1 ÷ 100 =

Answer key

  1. 421100
  2. 205500
  3. 26.19
  4. 0.3392
  5. 0.01062
  6. 0.4758
  7. 221900
  8. 3812
  9. 455600
  10. 13710
  11. 20740
  12. 0.431
  13. 43.36
  14. 14200
  15. 22820
  16. 0.03733
  17. 1361
  18. 173100
  19. 1.284
  20. 1447
  21. 0.441
  22. 2.666
  23. 0.4541
  24. 4171
  25. 0.03695
  26. 298500
  27. 0.2236
  28. 79.2
  29. 0.447
  30. 31.78
  31. 0.2579
  32. 369900
  33. 15820
  34. 164.3
  35. 1.792
  36. 0.01009
  37. 3.725
  38. 110.1
  39. 0.4638
  40. 3.431

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