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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 301 · 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. 1.7.7 ÷ 10 =
  2. 2.340.7 ÷ 10 =
  3. 3.8.85 ÷ 100 =
  4. 4.31.81 × 1000 =
  5. 5.105.1 × 1000 =
  6. 6.15.24 × 100 =
  7. 7.343.1 × 10 =
  8. 8.25.35 ÷ 1000 =
  9. 9.290.7 ÷ 10 =
  10. 10.450.3 × 1000 =
  11. 11.132.1 × 1000 =
  12. 12.16.32 × 10 =
  13. 13.381.1 ÷ 10 =
  14. 14.221.4 × 100 =
  15. 15.138.6 × 10 =
  16. 16.35.91 × 100 =
  17. 17.125.4 × 1000 =
  18. 18.199.3 × 10 =
  19. 19.168.9 ÷ 10 =
  20. 20.27.02 ÷ 100 =
  21. 21.165.8 × 100 =
  22. 22.108.5 × 1000 =
  23. 23.421.3 ÷ 1000 =
  24. 24.0.55 ÷ 1000 =
  25. 25.39.05 × 10 =
  26. 26.27.92 ÷ 10 =
  27. 27.1.71 × 10 =
  28. 28.182.5 ÷ 10 =
  29. 29.3.47 × 1000 =
  30. 30.335.4 ÷ 1000 =
  31. 31.408.2 ÷ 10 =
  32. 32.335.1 ÷ 10 =
  33. 33.12.96 ÷ 1000 =
  34. 34.41.28 ÷ 10 =
  35. 35.1.81 ÷ 1000 =
  36. 36.11.21 ÷ 10 =
  37. 37.30.82 × 100 =
  38. 38.73.2 × 10 =
  39. 39.14.08 ÷ 10 =
  40. 40.45.89 × 1000 =

Answer key

  1. 0.77
  2. 34.07
  3. 0.0885
  4. 31810
  5. 105100
  6. 1524
  7. 3431
  8. 0.02535
  9. 29.07
  10. 450300
  11. 132100
  12. 163.2
  13. 38.11
  14. 22140
  15. 1386
  16. 3591
  17. 125400
  18. 1993
  19. 16.89
  20. 0.2702
  21. 16580
  22. 108500
  23. 0.4213
  24. 0.00055
  25. 390.5
  26. 2.792
  27. 17.1
  28. 18.25
  29. 3470
  30. 0.3354
  31. 40.82
  32. 33.51
  33. 0.01296
  34. 4.128
  35. 0.00181
  36. 1.121
  37. 3082
  38. 732
  39. 1.408
  40. 45890

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