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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 598 · 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. 1.39.65 × 1000 =
  2. 2.148.3 ÷ 1000 =
  3. 3.129.5 ÷ 100 =
  4. 4.258.9 ÷ 10 =
  5. 5.312.5 ÷ 10 =
  6. 6.13.65 × 1000 =
  7. 7.1.13 ÷ 10 =
  8. 8.47.64 ÷ 1000 =
  9. 9.4.11 × 10 =
  10. 10.24.45 × 10 =
  11. 11.22.93 ÷ 1000 =
  12. 12.140.8 × 100 =
  13. 13.13.22 ÷ 1000 =
  14. 14.31.72 × 1000 =
  15. 15.61.8 ÷ 10 =
  16. 16.47.41 ÷ 1000 =
  17. 17.432.3 ÷ 1000 =
  18. 18.212.4 × 1000 =
  19. 19.249.5 ÷ 10 =
  20. 20.8.11 ÷ 100 =
  21. 21.57.6 × 10 =
  22. 22.0.53 ÷ 1000 =
  23. 23.43.21 × 10 =
  24. 24.2.01 ÷ 1000 =
  25. 25.31.52 ÷ 100 =
  26. 26.33.74 × 10 =
  27. 27.112.3 × 10 =
  28. 28.47.9 × 10 =
  29. 29.33.92 × 10 =
  30. 30.54.5 × 10 =
  31. 31.400.1 × 10 =
  32. 32.29.41 × 100 =
  33. 33.2.31 × 100 =
  34. 34.125.2 ÷ 1000 =
  35. 35.22.69 × 10 =
  36. 36.30.95 ÷ 10 =
  37. 37.28.46 × 1000 =
  38. 38.242.1 × 1000 =
  39. 39.10.61 × 1000 =
  40. 40.353.1 ÷ 1000 =

Answer key

  1. 39650
  2. 0.1483
  3. 1.295
  4. 25.89
  5. 31.25
  6. 13650
  7. 0.113
  8. 0.04764
  9. 41.1
  10. 244.5
  11. 0.02293
  12. 14080
  13. 0.01322
  14. 31720
  15. 6.18
  16. 0.04741
  17. 0.4323
  18. 212400
  19. 24.95
  20. 0.0811
  21. 576
  22. 0.00053
  23. 432.1
  24. 0.00201
  25. 0.3152
  26. 337.4
  27. 1123
  28. 479
  29. 339.2
  30. 545
  31. 4001
  32. 2941
  33. 231
  34. 0.1252
  35. 226.9
  36. 3.095
  37. 28460
  38. 242100
  39. 10610
  40. 0.3531

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