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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 10 · 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. 1.197.1 × 100 =
  2. 2.4.34 ÷ 100 =
  3. 3.8.49 × 100 =
  4. 4.40.84 × 100 =
  5. 5.38.67 × 1000 =
  6. 6.6.72 × 1000 =
  7. 7.21.51 × 10 =
  8. 8.140.6 × 10 =
  9. 9.393.5 × 10 =
  10. 10.225.1 ÷ 100 =
  11. 11.260.2 ÷ 10 =
  12. 12.382.8 × 10 =
  13. 13.27.21 ÷ 1000 =
  14. 14.19.79 ÷ 10 =
  15. 15.97.5 ÷ 10 =
  16. 16.7.45 × 10 =
  17. 17.499.7 × 10 =
  18. 18.47.8 ÷ 10 =
  19. 19.244.4 × 10 =
  20. 20.48.4 ÷ 1000 =
  21. 21.23.53 ÷ 10 =
  22. 22.89.1 × 100 =
  23. 23.271.6 ÷ 100 =
  24. 24.111.1 ÷ 100 =
  25. 25.230.7 × 100 =
  26. 26.80.9 × 1000 =
  27. 27.13.41 ÷ 100 =
  28. 28.40.19 ÷ 1000 =
  29. 29.44.35 × 1000 =
  30. 30.14.78 ÷ 10 =
  31. 31.236.1 ÷ 10 =
  32. 32.41.31 × 1000 =
  33. 33.6.53 × 10 =
  34. 34.6.65 ÷ 10 =
  35. 35.410.1 ÷ 1000 =
  36. 36.33.82 ÷ 10 =
  37. 37.196.1 × 100 =
  38. 38.91.1 ÷ 10 =
  39. 39.25.39 × 1000 =
  40. 40.75.6 × 10 =

Answer key

  1. 19710
  2. 0.0434
  3. 849
  4. 4084
  5. 38670
  6. 6720
  7. 215.1
  8. 1406
  9. 3935
  10. 2.251
  11. 26.02
  12. 3828
  13. 0.02721
  14. 1.979
  15. 9.75
  16. 74.5
  17. 4997
  18. 4.78
  19. 2444
  20. 0.0484
  21. 2.353
  22. 8910
  23. 2.716
  24. 1.111
  25. 23070
  26. 80900
  27. 0.1341
  28. 0.04019
  29. 44350
  30. 1.478
  31. 23.61
  32. 41310
  33. 65.3
  34. 0.665
  35. 0.4101
  36. 3.382
  37. 19610
  38. 9.11
  39. 25390
  40. 756

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