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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 726 · 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. 1.289.8 × 10 =
  2. 2.18.14 × 10 =
  3. 3.139.9 × 10 =
  4. 4.279.6 ÷ 100 =
  5. 5.462.1 ÷ 10 =
  6. 6.448.2 × 100 =
  7. 7.425.1 × 10 =
  8. 8.42.54 ÷ 100 =
  9. 9.6.81 ÷ 100 =
  10. 10.306.4 × 100 =
  11. 11.6.89 ÷ 10 =
  12. 12.47.6 ÷ 10 =
  13. 13.356.5 × 100 =
  14. 14.459.4 ÷ 1000 =
  15. 15.399.1 ÷ 1000 =
  16. 16.187.6 × 1000 =
  17. 17.4.01 × 1000 =
  18. 18.277.1 × 1000 =
  19. 19.426.3 × 10 =
  20. 20.348.4 ÷ 10 =
  21. 21.2.84 ÷ 100 =
  22. 22.22.51 × 10 =
  23. 23.11.67 ÷ 10 =
  24. 24.10.58 × 100 =
  25. 25.236.7 × 100 =
  26. 26.465.1 ÷ 10 =
  27. 27.29.03 ÷ 10 =
  28. 28.38.06 × 10 =
  29. 29.6.54 × 10 =
  30. 30.154.2 ÷ 10 =
  31. 31.487.4 × 1000 =
  32. 32.491.1 × 100 =
  33. 33.393.9 ÷ 10 =
  34. 34.25.53 × 100 =
  35. 35.300.1 × 100 =
  36. 36.272.4 ÷ 100 =
  37. 37.44.11 × 1000 =
  38. 38.19.74 ÷ 1000 =
  39. 39.315.8 × 1000 =
  40. 40.35.95 × 10 =

Answer key

  1. 2898
  2. 181.4
  3. 1399
  4. 2.796
  5. 46.21
  6. 44820
  7. 4251
  8. 0.4254
  9. 0.0681
  10. 30640
  11. 0.689
  12. 4.76
  13. 35650
  14. 0.4594
  15. 0.3991
  16. 187600
  17. 4010
  18. 277100
  19. 4263
  20. 34.84
  21. 0.0284
  22. 225.1
  23. 1.167
  24. 1058
  25. 23670
  26. 46.51
  27. 2.903
  28. 380.6
  29. 65.4
  30. 15.42
  31. 487400
  32. 49110
  33. 39.39
  34. 2553
  35. 30010
  36. 2.724
  37. 44110
  38. 0.01974
  39. 315800
  40. 359.5

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