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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 191 · 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. 1.137.9 × 1000 =
  2. 2.153.3 ÷ 1000 =
  3. 3.399.9 × 10 =
  4. 4.47.68 ÷ 100 =
  5. 5.206.5 × 10 =
  6. 6.480.5 × 1000 =
  7. 7.298.5 ÷ 1000 =
  8. 8.121.7 × 100 =
  9. 9.142.4 ÷ 10 =
  10. 10.4.72 ÷ 100 =
  11. 11.419.1 ÷ 100 =
  12. 12.33.46 ÷ 10 =
  13. 13.29.93 ÷ 1000 =
  14. 14.10.08 ÷ 100 =
  15. 15.134.8 × 10 =
  16. 16.387.1 × 100 =
  17. 17.4.37 ÷ 100 =
  18. 18.270.9 × 1000 =
  19. 19.409.1 × 1000 =
  20. 20.1.3 ÷ 1000 =
  21. 21.16.41 ÷ 10 =
  22. 22.344.7 × 1000 =
  23. 23.38.41 × 10 =
  24. 24.163.9 × 10 =
  25. 25.14.95 × 10 =
  26. 26.29.65 ÷ 1000 =
  27. 27.14.46 × 100 =
  28. 28.40.87 ÷ 10 =
  29. 29.229.9 ÷ 100 =
  30. 30.23.35 ÷ 100 =
  31. 31.316.2 ÷ 10 =
  32. 32.40.08 ÷ 1000 =
  33. 33.14.85 × 10 =
  34. 34.340.9 ÷ 10 =
  35. 35.38.42 ÷ 100 =
  36. 36.161.6 × 100 =
  37. 37.139.5 × 10 =
  38. 38.22.59 ÷ 1000 =
  39. 39.382.9 × 10 =
  40. 40.207.9 ÷ 10 =

Answer key

  1. 137900
  2. 0.1533
  3. 3999
  4. 0.4768
  5. 2065
  6. 480500
  7. 0.2985
  8. 12170
  9. 14.24
  10. 0.0472
  11. 4.191
  12. 3.346
  13. 0.02993
  14. 0.1008
  15. 1348
  16. 38710
  17. 0.0437
  18. 270900
  19. 409100
  20. 0.0013
  21. 1.641
  22. 344700
  23. 384.1
  24. 1639
  25. 149.5
  26. 0.02965
  27. 1446
  28. 4.087
  29. 2.299
  30. 0.2335
  31. 31.62
  32. 0.04008
  33. 148.5
  34. 34.09
  35. 0.3842
  36. 16160
  37. 1395
  38. 0.02259
  39. 3829
  40. 20.79

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