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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 956 · 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. 1.3.21 × 100 =
  2. 2.424.1 × 100 =
  3. 3.29.46 × 10 =
  4. 4.270.5 × 1000 =
  5. 5.1.06 × 10 =
  6. 6.290.1 ÷ 1000 =
  7. 7.30.91 ÷ 100 =
  8. 8.496.9 × 10 =
  9. 9.181.6 ÷ 100 =
  10. 10.232.1 ÷ 1000 =
  11. 11.20.41 ÷ 100 =
  12. 12.12.34 ÷ 10 =
  13. 13.263.5 × 10 =
  14. 14.12.77 ÷ 1000 =
  15. 15.366.8 ÷ 1000 =
  16. 16.359.6 ÷ 10 =
  17. 17.33.22 × 100 =
  18. 18.0.56 ÷ 10 =
  19. 19.1.65 × 100 =
  20. 20.26.31 × 10 =
  21. 21.8.31 ÷ 100 =
  22. 22.25.47 × 1000 =
  23. 23.341.6 ÷ 1000 =
  24. 24.6.61 × 100 =
  25. 25.39.76 ÷ 1000 =
  26. 26.43.09 × 1000 =
  27. 27.191.9 × 100 =
  28. 28.36.18 × 10 =
  29. 29.156.7 × 1000 =
  30. 30.292.3 ÷ 1000 =
  31. 31.38.72 × 100 =
  32. 32.20.6 × 1000 =
  33. 33.426.7 × 10 =
  34. 34.5.44 ÷ 100 =
  35. 35.98.1 × 100 =
  36. 36.299.8 × 100 =
  37. 37.13.55 ÷ 100 =
  38. 38.249.1 × 1000 =
  39. 39.120.8 × 100 =
  40. 40.229.2 × 100 =

Answer key

  1. 321
  2. 42410
  3. 294.6
  4. 270500
  5. 10.6
  6. 0.2901
  7. 0.3091
  8. 4969
  9. 1.816
  10. 0.2321
  11. 0.2041
  12. 1.234
  13. 2635
  14. 0.01277
  15. 0.3668
  16. 35.96
  17. 3322
  18. 0.056
  19. 165
  20. 263.1
  21. 0.0831
  22. 25470
  23. 0.3416
  24. 661
  25. 0.03976
  26. 43090
  27. 19190
  28. 361.8
  29. 156700
  30. 0.2923
  31. 3872
  32. 20600
  33. 4267
  34. 0.0544
  35. 9810
  36. 29980
  37. 0.1355
  38. 249100
  39. 12080
  40. 22920

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