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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 460 · 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. 1.2.99 × 1000 =
  2. 2.9.72 ÷ 10 =
  3. 3.19.3 × 1000 =
  4. 4.315.2 × 1000 =
  5. 5.17.69 × 10 =
  6. 6.37.4 × 100 =
  7. 7.48.57 × 1000 =
  8. 8.1.16 × 10 =
  9. 9.20.99 × 10 =
  10. 10.38.06 ÷ 100 =
  11. 11.470.1 × 1000 =
  12. 12.43.43 ÷ 100 =
  13. 13.375.9 × 1000 =
  14. 14.447.1 × 10 =
  15. 15.38.7 ÷ 10 =
  16. 16.29.61 ÷ 100 =
  17. 17.36.1 × 100 =
  18. 18.439.6 ÷ 1000 =
  19. 19.9.6 × 10 =
  20. 20.4.53 ÷ 10 =
  21. 21.40.51 × 100 =
  22. 22.177.3 × 1000 =
  23. 23.468.5 ÷ 10 =
  24. 24.182.3 ÷ 1000 =
  25. 25.282.1 × 1000 =
  26. 26.12.83 × 10 =
  27. 27.233.5 ÷ 1000 =
  28. 28.127.8 × 1000 =
  29. 29.2.24 × 1000 =
  30. 30.421.2 ÷ 100 =
  31. 31.472.7 ÷ 1000 =
  32. 32.0.78 × 10 =
  33. 33.12.62 × 10 =
  34. 34.33.11 × 100 =
  35. 35.23.91 ÷ 10 =
  36. 36.8.08 ÷ 100 =
  37. 37.235.4 × 10 =
  38. 38.366.6 × 10 =
  39. 39.350.1 × 1000 =
  40. 40.8.12 ÷ 100 =

Answer key

  1. 2990
  2. 0.972
  3. 19300
  4. 315200
  5. 176.9
  6. 3740
  7. 48570
  8. 11.6
  9. 209.9
  10. 0.3806
  11. 470100
  12. 0.4343
  13. 375900
  14. 4471
  15. 3.87
  16. 0.2961
  17. 3610
  18. 0.4396
  19. 96
  20. 0.453
  21. 4051
  22. 177300
  23. 46.85
  24. 0.1823
  25. 282100
  26. 128.3
  27. 0.2335
  28. 127800
  29. 2240
  30. 4.212
  31. 0.4727
  32. 7.8
  33. 126.2
  34. 3311
  35. 2.391
  36. 0.0808
  37. 2354
  38. 3666
  39. 350100
  40. 0.0812

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