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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 221 · 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. 1.395.1 × 100 =
  2. 2.145.7 × 100 =
  3. 3.4.06 × 100 =
  4. 4.79.7 × 100 =
  5. 5.13.31 × 1000 =
  6. 6.322.8 ÷ 100 =
  7. 7.42.51 × 10 =
  8. 8.47.11 ÷ 100 =
  9. 9.375.9 × 10 =
  10. 10.47.55 × 100 =
  11. 11.453.2 ÷ 1000 =
  12. 12.2.41 ÷ 100 =
  13. 13.30.31 ÷ 1000 =
  14. 14.2.36 × 10 =
  15. 15.3.79 × 10 =
  16. 16.429.1 ÷ 100 =
  17. 17.214.8 × 1000 =
  18. 18.339.7 × 100 =
  19. 19.403.5 ÷ 100 =
  20. 20.5.1 × 10 =
  21. 21.8.34 ÷ 100 =
  22. 22.35.28 ÷ 10 =
  23. 23.452.4 ÷ 10 =
  24. 24.36.01 ÷ 10 =
  25. 25.48.38 ÷ 100 =
  26. 26.29.42 × 100 =
  27. 27.143.1 ÷ 10 =
  28. 28.206.2 × 10 =
  29. 29.416.9 ÷ 1000 =
  30. 30.258.1 × 100 =
  31. 31.246.5 ÷ 1000 =
  32. 32.47.11 ÷ 1000 =
  33. 33.37.48 × 1000 =
  34. 34.226.9 × 100 =
  35. 35.236.5 ÷ 10 =
  36. 36.0.77 × 1000 =
  37. 37.287.1 × 100 =
  38. 38.43.7 × 1000 =
  39. 39.4.78 ÷ 10 =
  40. 40.275.1 × 100 =

Answer key

  1. 39510
  2. 14570
  3. 406
  4. 7970
  5. 13310
  6. 3.228
  7. 425.1
  8. 0.4711
  9. 3759
  10. 4755
  11. 0.4532
  12. 0.0241
  13. 0.03031
  14. 23.6
  15. 37.9
  16. 4.291
  17. 214800
  18. 33970
  19. 4.035
  20. 51
  21. 0.0834
  22. 3.528
  23. 45.24
  24. 3.601
  25. 0.4838
  26. 2942
  27. 14.31
  28. 2062
  29. 0.4169
  30. 25810
  31. 0.2465
  32. 0.04711
  33. 37480
  34. 22690
  35. 23.65
  36. 770
  37. 28710
  38. 43700
  39. 0.478
  40. 27510

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