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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 415 · 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. 1.42.08 × 100 =
  2. 2.40.2 × 100 =
  3. 3.317.6 × 10 =
  4. 4.91.6 ÷ 100 =
  5. 5.10.55 × 1000 =
  6. 6.319.8 × 1000 =
  7. 7.226.1 × 100 =
  8. 8.386.5 × 1000 =
  9. 9.499.2 ÷ 10 =
  10. 10.41.94 ÷ 100 =
  11. 11.27.76 × 100 =
  12. 12.27.8 ÷ 10 =
  13. 13.20.46 × 10 =
  14. 14.56.4 ÷ 10 =
  15. 15.109.6 ÷ 100 =
  16. 16.42.99 ÷ 1000 =
  17. 17.119.3 ÷ 100 =
  18. 18.131.6 ÷ 1000 =
  19. 19.3.83 × 1000 =
  20. 20.169.9 × 1000 =
  21. 21.23.4 × 100 =
  22. 22.49.41 ÷ 10 =
  23. 23.452.1 × 1000 =
  24. 24.9.44 × 100 =
  25. 25.49.97 ÷ 10 =
  26. 26.124.3 ÷ 1000 =
  27. 27.366.8 ÷ 100 =
  28. 28.397.1 ÷ 100 =
  29. 29.476.3 ÷ 10 =
  30. 30.107.6 ÷ 1000 =
  31. 31.5.2 × 10 =
  32. 32.312.9 × 1000 =
  33. 33.223.4 × 100 =
  34. 34.1.42 ÷ 100 =
  35. 35.362.7 × 10 =
  36. 36.8.21 ÷ 10 =
  37. 37.44.51 × 100 =
  38. 38.46.61 ÷ 1000 =
  39. 39.6.79 × 1000 =
  40. 40.8.18 × 10 =

Answer key

  1. 4208
  2. 4020
  3. 3176
  4. 0.916
  5. 10550
  6. 319800
  7. 22610
  8. 386500
  9. 49.92
  10. 0.4194
  11. 2776
  12. 2.78
  13. 204.6
  14. 5.64
  15. 1.096
  16. 0.04299
  17. 1.193
  18. 0.1316
  19. 3830
  20. 169900
  21. 2340
  22. 4.941
  23. 452100
  24. 944
  25. 4.997
  26. 0.1243
  27. 3.668
  28. 3.971
  29. 47.63
  30. 0.1076
  31. 52
  32. 312900
  33. 22340
  34. 0.0142
  35. 3627
  36. 0.821
  37. 4451
  38. 0.04661
  39. 6790
  40. 81.8

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