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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 258 · 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. 1.7.87 × 100 =
  2. 2.123.8 ÷ 100 =
  3. 3.394.5 × 10 =
  4. 4.8.85 ÷ 1000 =
  5. 5.67.4 × 100 =
  6. 6.43.05 ÷ 10 =
  7. 7.3.86 × 10 =
  8. 8.1.47 × 100 =
  9. 9.270.6 ÷ 100 =
  10. 10.142.1 × 1000 =
  11. 11.481.9 × 1000 =
  12. 12.26.9 ÷ 100 =
  13. 13.40.1 ÷ 1000 =
  14. 14.6.66 × 10 =
  15. 15.150.8 × 1000 =
  16. 16.31.39 × 100 =
  17. 17.9.23 × 10 =
  18. 18.435.3 × 10 =
  19. 19.12.33 × 1000 =
  20. 20.43.21 ÷ 1000 =
  21. 21.131.1 ÷ 1000 =
  22. 22.285.1 × 10 =
  23. 23.37.72 ÷ 10 =
  24. 24.38.9 × 10 =
  25. 25.449.8 × 10 =
  26. 26.354.1 × 100 =
  27. 27.439.6 ÷ 1000 =
  28. 28.17.81 × 100 =
  29. 29.7.12 ÷ 100 =
  30. 30.35.1 ÷ 100 =
  31. 31.20.51 × 10 =
  32. 32.445.7 ÷ 10 =
  33. 33.472.3 × 10 =
  34. 34.13.23 × 1000 =
  35. 35.42.7 × 10 =
  36. 36.8.24 ÷ 1000 =
  37. 37.63.3 ÷ 100 =
  38. 38.22.82 ÷ 10 =
  39. 39.189.2 × 100 =
  40. 40.115.2 ÷ 100 =

Answer key

  1. 787
  2. 1.238
  3. 3945
  4. 0.00885
  5. 6740
  6. 4.305
  7. 38.6
  8. 147
  9. 2.706
  10. 142100
  11. 481900
  12. 0.269
  13. 0.0401
  14. 66.6
  15. 150800
  16. 3139
  17. 92.3
  18. 4353
  19. 12330
  20. 0.04321
  21. 0.1311
  22. 2851
  23. 3.772
  24. 389
  25. 4498
  26. 35410
  27. 0.4396
  28. 1781
  29. 0.0712
  30. 0.351
  31. 205.1
  32. 44.57
  33. 4723
  34. 13230
  35. 427
  36. 0.00824
  37. 0.633
  38. 2.282
  39. 18920
  40. 1.152

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