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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 230 · 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. 1.403.1 × 100 =
  2. 2.306.8 ÷ 1000 =
  3. 3.21.89 × 10 =
  4. 4.308.1 ÷ 1000 =
  5. 5.7.37 ÷ 10 =
  6. 6.359.2 ÷ 10 =
  7. 7.428.3 × 1000 =
  8. 8.198.1 ÷ 10 =
  9. 9.456.3 × 1000 =
  10. 10.133.8 ÷ 10 =
  11. 11.144.4 ÷ 10 =
  12. 12.26.34 × 1000 =
  13. 13.215.2 × 10 =
  14. 14.139.5 ÷ 100 =
  15. 15.43.85 × 1000 =
  16. 16.129.3 ÷ 100 =
  17. 17.1.38 ÷ 100 =
  18. 18.65.1 × 1000 =
  19. 19.363.1 ÷ 10 =
  20. 20.380.8 × 10 =
  21. 21.43.83 ÷ 10 =
  22. 22.342.2 × 1000 =
  23. 23.4.74 × 1000 =
  24. 24.331.8 × 1000 =
  25. 25.38.28 × 10 =
  26. 26.16.05 × 1000 =
  27. 27.259.6 × 10 =
  28. 28.27.13 × 10 =
  29. 29.111.5 × 100 =
  30. 30.45.17 × 10 =
  31. 31.28.49 × 10 =
  32. 32.24.11 ÷ 1000 =
  33. 33.92.9 × 10 =
  34. 34.42.03 × 1000 =
  35. 35.4.5 ÷ 10 =
  36. 36.4.68 ÷ 100 =
  37. 37.150.5 ÷ 1000 =
  38. 38.5.7 ÷ 1000 =
  39. 39.32.1 × 1000 =
  40. 40.7.87 ÷ 10 =

Answer key

  1. 40310
  2. 0.3068
  3. 218.9
  4. 0.3081
  5. 0.737
  6. 35.92
  7. 428300
  8. 19.81
  9. 456300
  10. 13.38
  11. 14.44
  12. 26340
  13. 2152
  14. 1.395
  15. 43850
  16. 1.293
  17. 0.0138
  18. 65100
  19. 36.31
  20. 3808
  21. 4.383
  22. 342200
  23. 4740
  24. 331800
  25. 382.8
  26. 16050
  27. 2596
  28. 271.3
  29. 11150
  30. 451.7
  31. 284.9
  32. 0.02411
  33. 929
  34. 42030
  35. 0.45
  36. 0.0468
  37. 0.1505
  38. 0.0057
  39. 32100
  40. 0.787

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