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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 218 · 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. 1.215.1 ÷ 100 =
  2. 2.288.7 ÷ 10 =
  3. 3.37.5 × 100 =
  4. 4.39.75 ÷ 10 =
  5. 5.279.9 × 100 =
  6. 6.320.5 ÷ 10 =
  7. 7.278.1 ÷ 10 =
  8. 8.432.4 × 1000 =
  9. 9.29.7 ÷ 100 =
  10. 10.334.5 × 100 =
  11. 11.34.5 ÷ 100 =
  12. 12.363.4 ÷ 10 =
  13. 13.150.5 ÷ 100 =
  14. 14.42.08 × 100 =
  15. 15.3.48 ÷ 1000 =
  16. 16.49.96 ÷ 100 =
  17. 17.250.4 ÷ 1000 =
  18. 18.15.4 ÷ 100 =
  19. 19.25.8 ÷ 10 =
  20. 20.12.06 ÷ 10 =
  21. 21.247.5 ÷ 100 =
  22. 22.26.08 ÷ 10 =
  23. 23.464.9 ÷ 10 =
  24. 24.49.38 × 1000 =
  25. 25.212.9 ÷ 1000 =
  26. 26.29.46 ÷ 100 =
  27. 27.269.8 × 100 =
  28. 28.37.15 × 10 =
  29. 29.258.6 × 10 =
  30. 30.11.23 ÷ 100 =
  31. 31.43.86 × 10 =
  32. 32.15.8 × 10 =
  33. 33.142.1 × 10 =
  34. 34.80.1 × 100 =
  35. 35.361.5 × 10 =
  36. 36.371.4 × 100 =
  37. 37.8.3 ÷ 10 =
  38. 38.70.2 × 10 =
  39. 39.9.07 ÷ 10 =
  40. 40.488.2 × 1000 =

Answer key

  1. 2.151
  2. 28.87
  3. 3750
  4. 3.975
  5. 27990
  6. 32.05
  7. 27.81
  8. 432400
  9. 0.297
  10. 33450
  11. 0.345
  12. 36.34
  13. 1.505
  14. 4208
  15. 0.00348
  16. 0.4996
  17. 0.2504
  18. 0.154
  19. 2.58
  20. 1.206
  21. 2.475
  22. 2.608
  23. 46.49
  24. 49380
  25. 0.2129
  26. 0.2946
  27. 26980
  28. 371.5
  29. 2586
  30. 0.1123
  31. 438.6
  32. 158
  33. 1421
  34. 8010
  35. 3615
  36. 37140
  37. 0.83
  38. 702
  39. 0.907
  40. 488200

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