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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 420 · 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. 1.50.5 × 10 =
  2. 2.204.7 ÷ 10 =
  3. 3.32.62 × 10 =
  4. 4.5.57 ÷ 100 =
  5. 5.30.12 × 10 =
  6. 6.398.9 ÷ 1000 =
  7. 7.279.5 ÷ 100 =
  8. 8.39.31 × 10 =
  9. 9.309.7 × 10 =
  10. 10.20.99 ÷ 10 =
  11. 11.124.8 ÷ 100 =
  12. 12.47.01 × 10 =
  13. 13.48.73 ÷ 10 =
  14. 14.18.41 × 1000 =
  15. 15.214.3 × 10 =
  16. 16.358.1 × 1000 =
  17. 17.15.05 × 10 =
  18. 18.55.9 ÷ 100 =
  19. 19.7.96 × 1000 =
  20. 20.12.46 ÷ 1000 =
  21. 21.347.5 ÷ 1000 =
  22. 22.40.87 × 10 =
  23. 23.41.21 × 10 =
  24. 24.119.3 × 10 =
  25. 25.260.2 ÷ 1000 =
  26. 26.177.6 × 1000 =
  27. 27.34.83 ÷ 1000 =
  28. 28.22.34 × 10 =
  29. 29.36.07 ÷ 10 =
  30. 30.64.1 × 100 =
  31. 31.29.46 ÷ 10 =
  32. 32.484.7 × 10 =
  33. 33.27.26 × 1000 =
  34. 34.451.5 × 1000 =
  35. 35.145.8 × 10 =
  36. 36.192.4 × 10 =
  37. 37.115.4 × 10 =
  38. 38.362.7 × 1000 =
  39. 39.57.6 ÷ 100 =
  40. 40.25.91 ÷ 10 =

Answer key

  1. 505
  2. 20.47
  3. 326.2
  4. 0.0557
  5. 301.2
  6. 0.3989
  7. 2.795
  8. 393.1
  9. 3097
  10. 2.099
  11. 1.248
  12. 470.1
  13. 4.873
  14. 18410
  15. 2143
  16. 358100
  17. 150.5
  18. 0.559
  19. 7960
  20. 0.01246
  21. 0.3475
  22. 408.7
  23. 412.1
  24. 1193
  25. 0.2602
  26. 177600
  27. 0.03483
  28. 223.4
  29. 3.607
  30. 6410
  31. 2.946
  32. 4847
  33. 27260
  34. 451500
  35. 1458
  36. 1924
  37. 1154
  38. 362700
  39. 0.576
  40. 2.591

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