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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 905 · 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. 1.7.71 × 100 =
  2. 2.46.12 × 1000 =
  3. 3.245.4 × 1000 =
  4. 4.3.51 × 100 =
  5. 5.296.6 ÷ 10 =
  6. 6.239.1 × 100 =
  7. 7.23.98 ÷ 10 =
  8. 8.103.9 × 1000 =
  9. 9.460.6 × 100 =
  10. 10.408.9 ÷ 100 =
  11. 11.47.8 ÷ 10 =
  12. 12.23.87 × 100 =
  13. 13.31.17 × 100 =
  14. 14.6.29 × 10 =
  15. 15.9.64 ÷ 1000 =
  16. 16.367.6 × 10 =
  17. 17.38.05 × 100 =
  18. 18.31.11 × 10 =
  19. 19.406.2 × 1000 =
  20. 20.2.1 × 10 =
  21. 21.2.15 × 10 =
  22. 22.3.82 ÷ 100 =
  23. 23.36.71 × 1000 =
  24. 24.5.51 ÷ 100 =
  25. 25.30.41 × 10 =
  26. 26.35.54 ÷ 10 =
  27. 27.4.01 ÷ 1000 =
  28. 28.45.35 × 100 =
  29. 29.186.3 × 1000 =
  30. 30.147.8 ÷ 100 =
  31. 31.49.56 × 1000 =
  32. 32.27.92 ÷ 10 =
  33. 33.3.27 × 1000 =
  34. 34.234.2 × 100 =
  35. 35.61.1 ÷ 100 =
  36. 36.24.78 × 1000 =
  37. 37.1.47 ÷ 1000 =
  38. 38.140.5 ÷ 1000 =
  39. 39.16.14 ÷ 1000 =
  40. 40.366.7 ÷ 1000 =

Answer key

  1. 771
  2. 46120
  3. 245400
  4. 351
  5. 29.66
  6. 23910
  7. 2.398
  8. 103900
  9. 46060
  10. 4.089
  11. 4.78
  12. 2387
  13. 3117
  14. 62.9
  15. 0.00964
  16. 3676
  17. 3805
  18. 311.1
  19. 406200
  20. 21
  21. 21.5
  22. 0.0382
  23. 36710
  24. 0.0551
  25. 304.1
  26. 3.554
  27. 0.00401
  28. 4535
  29. 186300
  30. 1.478
  31. 49560
  32. 2.792
  33. 3270
  34. 23420
  35. 0.611
  36. 24780
  37. 0.00147
  38. 0.1405
  39. 0.01614
  40. 0.3667

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