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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 527 · 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. 1.81.1 × 10 =
  2. 2.27.34 ÷ 10 =
  3. 3.382.3 × 100 =
  4. 4.44.22 ÷ 10 =
  5. 5.129.5 ÷ 100 =
  6. 6.9.51 × 100 =
  7. 7.34.91 ÷ 100 =
  8. 8.38.53 × 10 =
  9. 9.13.51 ÷ 10 =
  10. 10.362.1 ÷ 100 =
  11. 11.11.42 × 1000 =
  12. 12.87.7 ÷ 1000 =
  13. 13.434.7 × 1000 =
  14. 14.20.39 × 100 =
  15. 15.181.2 × 1000 =
  16. 16.46.5 × 100 =
  17. 17.313.2 ÷ 10 =
  18. 18.68.8 × 1000 =
  19. 19.31.02 × 10 =
  20. 20.31.76 × 1000 =
  21. 21.263.3 × 10 =
  22. 22.124.9 ÷ 1000 =
  23. 23.74.9 ÷ 1000 =
  24. 24.73.2 × 10 =
  25. 25.11.52 × 1000 =
  26. 26.46.45 × 1000 =
  27. 27.362.6 × 10 =
  28. 28.7.63 × 100 =
  29. 29.67.9 × 100 =
  30. 30.295.7 × 10 =
  31. 31.38.03 × 1000 =
  32. 32.14.95 × 1000 =
  33. 33.366.7 × 10 =
  34. 34.57.8 ÷ 1000 =
  35. 35.25.96 × 10 =
  36. 36.48.91 × 100 =
  37. 37.201.5 × 10 =
  38. 38.69.2 ÷ 10 =
  39. 39.33.94 ÷ 100 =
  40. 40.49.32 ÷ 1000 =

Answer key

  1. 811
  2. 2.734
  3. 38230
  4. 4.422
  5. 1.295
  6. 951
  7. 0.3491
  8. 385.3
  9. 1.351
  10. 3.621
  11. 11420
  12. 0.0877
  13. 434700
  14. 2039
  15. 181200
  16. 4650
  17. 31.32
  18. 68800
  19. 310.2
  20. 31760
  21. 2633
  22. 0.1249
  23. 0.0749
  24. 732
  25. 11520
  26. 46450
  27. 3626
  28. 763
  29. 6790
  30. 2957
  31. 38030
  32. 14950
  33. 3667
  34. 0.0578
  35. 259.6
  36. 4891
  37. 2015
  38. 6.92
  39. 0.3394
  40. 0.04932

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