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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 523 · 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. 1.394.9 × 10 =
  2. 2.146.9 ÷ 10 =
  3. 3.136.1 × 100 =
  4. 4.24.1 ÷ 10 =
  5. 5.228.1 × 10 =
  6. 6.38.22 ÷ 10 =
  7. 7.101.1 × 10 =
  8. 8.5.37 × 100 =
  9. 9.348.3 × 100 =
  10. 10.12.21 ÷ 1000 =
  11. 11.229.3 × 100 =
  12. 12.39.91 × 100 =
  13. 13.2.96 ÷ 1000 =
  14. 14.231.9 × 1000 =
  15. 15.452.6 ÷ 10 =
  16. 16.26.01 ÷ 1000 =
  17. 17.23.55 × 1000 =
  18. 18.168.7 ÷ 10 =
  19. 19.10.88 × 1000 =
  20. 20.9.62 × 1000 =
  21. 21.30.18 × 10 =
  22. 22.19.81 × 1000 =
  23. 23.219.7 × 100 =
  24. 24.42.15 ÷ 100 =
  25. 25.6.23 ÷ 1000 =
  26. 26.437.8 ÷ 1000 =
  27. 27.70.8 × 100 =
  28. 28.327.5 ÷ 10 =
  29. 29.464.9 ÷ 1000 =
  30. 30.51.5 ÷ 1000 =
  31. 31.16.7 × 10 =
  32. 32.405.2 × 100 =
  33. 33.13.93 × 1000 =
  34. 34.12.78 × 1000 =
  35. 35.240.5 × 1000 =
  36. 36.301.1 × 100 =
  37. 37.46.63 ÷ 10 =
  38. 38.224.3 ÷ 10 =
  39. 39.34.13 ÷ 10 =
  40. 40.416.6 × 100 =

Answer key

  1. 3949
  2. 14.69
  3. 13610
  4. 2.41
  5. 2281
  6. 3.822
  7. 1011
  8. 537
  9. 34830
  10. 0.01221
  11. 22930
  12. 3991
  13. 0.00296
  14. 231900
  15. 45.26
  16. 0.02601
  17. 23550
  18. 16.87
  19. 10880
  20. 9620
  21. 301.8
  22. 19810
  23. 21970
  24. 0.4215
  25. 0.00623
  26. 0.4378
  27. 7080
  28. 32.75
  29. 0.4649
  30. 0.0515
  31. 167
  32. 40520
  33. 13930
  34. 12780
  35. 240500
  36. 30110
  37. 4.663
  38. 22.43
  39. 3.413
  40. 41660

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