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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 651 · 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. 1.32.13 × 10 =
  2. 2.405.8 ÷ 100 =
  3. 3.24.01 × 10 =
  4. 4.393.2 × 100 =
  5. 5.16.72 ÷ 100 =
  6. 6.117.4 × 10 =
  7. 7.60.1 × 100 =
  8. 8.312.4 × 1000 =
  9. 9.330.1 × 10 =
  10. 10.45.71 ÷ 1000 =
  11. 11.7.65 ÷ 100 =
  12. 12.292.7 × 100 =
  13. 13.9.87 × 100 =
  14. 14.43.34 ÷ 1000 =
  15. 15.2.86 × 100 =
  16. 16.447.1 × 1000 =
  17. 17.3.31 × 10 =
  18. 18.12.15 × 100 =
  19. 19.276.2 × 100 =
  20. 20.17.69 × 1000 =
  21. 21.12.93 × 1000 =
  22. 22.8.19 × 1000 =
  23. 23.140.9 ÷ 10 =
  24. 24.380.9 ÷ 10 =
  25. 25.49.78 ÷ 100 =
  26. 26.1.52 ÷ 100 =
  27. 27.143.7 ÷ 10 =
  28. 28.350.8 ÷ 10 =
  29. 29.45.65 ÷ 100 =
  30. 30.341.3 ÷ 1000 =
  31. 31.284.6 ÷ 1000 =
  32. 32.9.84 × 10 =
  33. 33.28.53 × 10 =
  34. 34.85.9 ÷ 1000 =
  35. 35.109.5 × 100 =
  36. 36.42.54 ÷ 10 =
  37. 37.343.1 ÷ 10 =
  38. 38.86.5 ÷ 1000 =
  39. 39.20.28 × 10 =
  40. 40.12.31 × 100 =

Answer key

  1. 321.3
  2. 4.058
  3. 240.1
  4. 39320
  5. 0.1672
  6. 1174
  7. 6010
  8. 312400
  9. 3301
  10. 0.04571
  11. 0.0765
  12. 29270
  13. 987
  14. 0.04334
  15. 286
  16. 447100
  17. 33.1
  18. 1215
  19. 27620
  20. 17690
  21. 12930
  22. 8190
  23. 14.09
  24. 38.09
  25. 0.4978
  26. 0.0152
  27. 14.37
  28. 35.08
  29. 0.4565
  30. 0.3413
  31. 0.2846
  32. 98.4
  33. 285.3
  34. 0.0859
  35. 10950
  36. 4.254
  37. 34.31
  38. 0.0865
  39. 202.8
  40. 1231

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