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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 341 · 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. 1.73.9 × 1000 =
  2. 2.393.4 × 1000 =
  3. 3.92.9 ÷ 100 =
  4. 4.8.21 × 10 =
  5. 5.36.1 ÷ 10 =
  6. 6.186.9 × 100 =
  7. 7.23.26 × 100 =
  8. 8.18.03 × 1000 =
  9. 9.35.23 × 1000 =
  10. 10.35.27 × 1000 =
  11. 11.202.7 ÷ 10 =
  12. 12.6.78 × 10 =
  13. 13.384.8 × 100 =
  14. 14.304.5 ÷ 10 =
  15. 15.12.79 × 100 =
  16. 16.18.71 × 100 =
  17. 17.123.2 × 10 =
  18. 18.459.7 × 1000 =
  19. 19.287.5 × 10 =
  20. 20.36.97 × 100 =
  21. 21.286.9 ÷ 10 =
  22. 22.453.4 ÷ 100 =
  23. 23.20.02 × 1000 =
  24. 24.56.9 × 1000 =
  25. 25.306.1 ÷ 10 =
  26. 26.314.1 ÷ 10 =
  27. 27.40.6 ÷ 1000 =
  28. 28.194.1 × 10 =
  29. 29.28.9 × 1000 =
  30. 30.18.5 × 10 =
  31. 31.438.1 × 1000 =
  32. 32.22.31 × 1000 =
  33. 33.13.33 × 100 =
  34. 34.49.81 ÷ 1000 =
  35. 35.10.93 × 10 =
  36. 36.0.44 × 10 =
  37. 37.16.11 ÷ 10 =
  38. 38.404.2 × 1000 =
  39. 39.78.1 × 10 =
  40. 40.48.02 × 1000 =

Answer key

  1. 73900
  2. 393400
  3. 0.929
  4. 82.1
  5. 3.61
  6. 18690
  7. 2326
  8. 18030
  9. 35230
  10. 35270
  11. 20.27
  12. 67.8
  13. 38480
  14. 30.45
  15. 1279
  16. 1871
  17. 1232
  18. 459700
  19. 2875
  20. 3697
  21. 28.69
  22. 4.534
  23. 20020
  24. 56900
  25. 30.61
  26. 31.41
  27. 0.0406
  28. 1941
  29. 28900
  30. 185
  31. 438100
  32. 22310
  33. 1333
  34. 0.04981
  35. 109.3
  36. 4.4
  37. 1.611
  38. 404200
  39. 781
  40. 48020

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