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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 4 · 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. 1.400.6 × 10 =
  2. 2.28.32 × 100 =
  3. 3.317.3 × 10 =
  4. 4.13.04 ÷ 100 =
  5. 5.27.01 × 100 =
  6. 6.398.9 ÷ 100 =
  7. 7.456.3 ÷ 1000 =
  8. 8.207.8 × 100 =
  9. 9.166.9 ÷ 100 =
  10. 10.420.4 × 100 =
  11. 11.48.41 ÷ 1000 =
  12. 12.43.79 ÷ 1000 =
  13. 13.26.19 × 10 =
  14. 14.96.2 ÷ 10 =
  15. 15.48.59 × 10 =
  16. 16.42.35 ÷ 100 =
  17. 17.49.33 ÷ 1000 =
  18. 18.212.3 ÷ 1000 =
  19. 19.241.5 × 10 =
  20. 20.26.1 × 1000 =
  21. 21.435.9 ÷ 10 =
  22. 22.197.1 ÷ 1000 =
  23. 23.32.51 ÷ 100 =
  24. 24.412.2 × 10 =
  25. 25.17.65 ÷ 10 =
  26. 26.9.15 × 1000 =
  27. 27.145.1 ÷ 10 =
  28. 28.214.4 ÷ 10 =
  29. 29.31.82 ÷ 10 =
  30. 30.18.3 × 1000 =
  31. 31.249.2 ÷ 10 =
  32. 32.400.1 × 100 =
  33. 33.49.81 × 10 =
  34. 34.38.08 × 1000 =
  35. 35.107.4 × 10 =
  36. 36.429.5 ÷ 10 =
  37. 37.488.1 ÷ 10 =
  38. 38.138.6 ÷ 100 =
  39. 39.23.63 × 100 =
  40. 40.8.86 × 10 =

Answer key

  1. 4006
  2. 2832
  3. 3173
  4. 0.1304
  5. 2701
  6. 3.989
  7. 0.4563
  8. 20780
  9. 1.669
  10. 42040
  11. 0.04841
  12. 0.04379
  13. 261.9
  14. 9.62
  15. 485.9
  16. 0.4235
  17. 0.04933
  18. 0.2123
  19. 2415
  20. 26100
  21. 43.59
  22. 0.1971
  23. 0.3251
  24. 4122
  25. 1.765
  26. 9150
  27. 14.51
  28. 21.44
  29. 3.182
  30. 18300
  31. 24.92
  32. 40010
  33. 498.1
  34. 38080
  35. 1074
  36. 42.95
  37. 48.81
  38. 1.386
  39. 2363
  40. 88.6

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