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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 142 · 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. 1.352.9 ÷ 100 =
  2. 2.2.2 × 100 =
  3. 3.4.5 × 1000 =
  4. 4.2.29 ÷ 10 =
  5. 5.123.9 ÷ 10 =
  6. 6.399.7 × 1000 =
  7. 7.36.11 ÷ 100 =
  8. 8.29.83 × 100 =
  9. 9.428.8 ÷ 100 =
  10. 10.6.6 ÷ 1000 =
  11. 11.2.17 × 10 =
  12. 12.48.81 × 10 =
  13. 13.247.8 ÷ 100 =
  14. 14.7.3 × 100 =
  15. 15.397.9 × 100 =
  16. 16.40.86 ÷ 10 =
  17. 17.16.77 × 100 =
  18. 18.1.45 × 10 =
  19. 19.40.57 ÷ 1000 =
  20. 20.82.9 ÷ 10 =
  21. 21.156.1 ÷ 10 =
  22. 22.453.9 × 1000 =
  23. 23.3.8 × 1000 =
  24. 24.5.29 × 100 =
  25. 25.32.25 × 10 =
  26. 26.7.5 ÷ 1000 =
  27. 27.370.3 ÷ 10 =
  28. 28.49.38 × 100 =
  29. 29.62.3 × 100 =
  30. 30.30.23 ÷ 1000 =
  31. 31.0.69 × 100 =
  32. 32.157.1 × 1000 =
  33. 33.205.5 × 100 =
  34. 34.107.4 ÷ 100 =
  35. 35.4.96 × 1000 =
  36. 36.137.6 × 100 =
  37. 37.12.11 × 100 =
  38. 38.340.4 × 1000 =
  39. 39.26.96 × 10 =
  40. 40.137.2 × 10 =

Answer key

  1. 3.529
  2. 220
  3. 4500
  4. 0.229
  5. 12.39
  6. 399700
  7. 0.3611
  8. 2983
  9. 4.288
  10. 0.0066
  11. 21.7
  12. 488.1
  13. 2.478
  14. 730
  15. 39790
  16. 4.086
  17. 1677
  18. 14.5
  19. 0.04057
  20. 8.29
  21. 15.61
  22. 453900
  23. 3800
  24. 529
  25. 322.5
  26. 0.0075
  27. 37.03
  28. 4938
  29. 6230
  30. 0.03023
  31. 69
  32. 157100
  33. 20550
  34. 1.074
  35. 4960
  36. 13760
  37. 1211
  38. 340400
  39. 269.6
  40. 1372

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