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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 540 · 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. 1.8.21 × 100 =
  2. 2.35.81 ÷ 100 =
  3. 3.13.84 ÷ 100 =
  4. 4.27.27 × 1000 =
  5. 5.345.6 ÷ 1000 =
  6. 6.10.89 × 100 =
  7. 7.4.45 ÷ 100 =
  8. 8.23.02 ÷ 1000 =
  9. 9.14.21 × 100 =
  10. 10.1.72 ÷ 1000 =
  11. 11.44.48 ÷ 1000 =
  12. 12.85.5 × 10 =
  13. 13.29.63 ÷ 10 =
  14. 14.67.7 × 100 =
  15. 15.499.4 × 1000 =
  16. 16.116.2 × 1000 =
  17. 17.45.42 ÷ 10 =
  18. 18.48.5 ÷ 1000 =
  19. 19.4.77 ÷ 100 =
  20. 20.326.1 × 100 =
  21. 21.42.28 ÷ 1000 =
  22. 22.88.7 ÷ 100 =
  23. 23.87.4 × 100 =
  24. 24.60.9 ÷ 1000 =
  25. 25.240.2 ÷ 100 =
  26. 26.1.22 × 10 =
  27. 27.141.3 × 10 =
  28. 28.15.79 ÷ 1000 =
  29. 29.7.61 ÷ 10 =
  30. 30.231.9 ÷ 10 =
  31. 31.276.8 ÷ 10 =
  32. 32.40.52 ÷ 10 =
  33. 33.418.1 × 10 =
  34. 34.488.1 × 10 =
  35. 35.411.1 ÷ 1000 =
  36. 36.26.7 × 1000 =
  37. 37.402.5 × 10 =
  38. 38.49.31 ÷ 10 =
  39. 39.348.1 ÷ 100 =
  40. 40.389.1 × 10 =

Answer key

  1. 821
  2. 0.3581
  3. 0.1384
  4. 27270
  5. 0.3456
  6. 1089
  7. 0.0445
  8. 0.02302
  9. 1421
  10. 0.00172
  11. 0.04448
  12. 855
  13. 2.963
  14. 6770
  15. 499400
  16. 116200
  17. 4.542
  18. 0.0485
  19. 0.0477
  20. 32610
  21. 0.04228
  22. 0.887
  23. 8740
  24. 0.0609
  25. 2.402
  26. 12.2
  27. 1413
  28. 0.01579
  29. 0.761
  30. 23.19
  31. 27.68
  32. 4.052
  33. 4181
  34. 4881
  35. 0.4111
  36. 26700
  37. 4025
  38. 4.931
  39. 3.481
  40. 3891

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