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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 946 · 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. 1.165.1 ÷ 10 =
  2. 2.217.2 × 10 =
  3. 3.423.8 ÷ 100 =
  4. 4.293.4 ÷ 100 =
  5. 5.72.3 × 100 =
  6. 6.12.87 × 1000 =
  7. 7.4.51 × 10 =
  8. 8.192.9 ÷ 100 =
  9. 9.389.7 × 10 =
  10. 10.18.41 ÷ 100 =
  11. 11.35.79 ÷ 1000 =
  12. 12.474.6 × 1000 =
  13. 13.6.31 × 1000 =
  14. 14.484.2 × 100 =
  15. 15.441.5 × 1000 =
  16. 16.37.81 × 1000 =
  17. 17.41.55 × 1000 =
  18. 18.15.31 × 1000 =
  19. 19.0.27 × 10 =
  20. 20.75.3 ÷ 10 =
  21. 21.49.87 ÷ 1000 =
  22. 22.223.8 × 10 =
  23. 23.39.05 × 100 =
  24. 24.9.38 × 100 =
  25. 25.12.22 × 10 =
  26. 26.9.81 × 100 =
  27. 27.6.86 × 1000 =
  28. 28.7.01 × 100 =
  29. 29.13.13 × 10 =
  30. 30.352.3 × 10 =
  31. 31.8.74 ÷ 1000 =
  32. 32.248.1 × 1000 =
  33. 33.127.1 × 1000 =
  34. 34.209.3 × 100 =
  35. 35.30.37 ÷ 1000 =
  36. 36.24.07 ÷ 10 =
  37. 37.108.8 × 100 =
  38. 38.24.71 ÷ 1000 =
  39. 39.12.08 × 10 =
  40. 40.43.11 × 100 =

Answer key

  1. 16.51
  2. 2172
  3. 4.238
  4. 2.934
  5. 7230
  6. 12870
  7. 45.1
  8. 1.929
  9. 3897
  10. 0.1841
  11. 0.03579
  12. 474600
  13. 6310
  14. 48420
  15. 441500
  16. 37810
  17. 41550
  18. 15310
  19. 2.7
  20. 7.53
  21. 0.04987
  22. 2238
  23. 3905
  24. 938
  25. 122.2
  26. 981
  27. 6860
  28. 701
  29. 131.3
  30. 3523
  31. 0.00874
  32. 248100
  33. 127100
  34. 20930
  35. 0.03037
  36. 2.407
  37. 10880
  38. 0.02471
  39. 120.8
  40. 4311

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