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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 210 · 40 questions
TalentJR

The fast method (Halve first): Halve the number. × 5: multiply the half by 10. × 50: multiply the half by 100. Odd number? Its half ends in .5 — 43 → 21.5 — and × 10 moves the point: 215.

NameDateTime takenScore ___ / 40
  1. 1.54 × 5 =
  2. 2.33 × 5 =
  3. 3.21 × 5 =
  4. 4.70 × 5 =
  5. 5.97 × 5 =
  6. 6.39 × 5 =
  7. 7.76 × 50 =
  8. 8.39 × 5 =
  9. 9.34 × 5 =
  10. 10.27 × 5 =
  11. 11.66 × 5 =
  12. 12.38 × 50 =
  13. 13.56 × 50 =
  14. 14.83 × 5 =
  15. 15.89 × 50 =
  16. 16.30 × 50 =
  17. 17.13 × 5 =
  18. 18.25 × 50 =
  19. 19.32 × 50 =
  20. 20.31 × 50 =
  21. 21.39 × 5 =
  22. 22.17 × 5 =
  23. 23.18 × 5 =
  24. 24.20 × 50 =
  25. 25.20 × 50 =
  26. 26.71 × 50 =
  27. 27.35 × 50 =
  28. 28.77 × 5 =
  29. 29.67 × 5 =
  30. 30.44 × 5 =
  31. 31.81 × 50 =
  32. 32.58 × 5 =
  33. 33.74 × 50 =
  34. 34.57 × 5 =
  35. 35.67 × 5 =
  36. 36.25 × 50 =
  37. 37.62 × 5 =
  38. 38.27 × 5 =
  39. 39.35 × 50 =
  40. 40.17 × 5 =

Answer key

  1. 270
  2. 165
  3. 105
  4. 350
  5. 485
  6. 195
  7. 3800
  8. 195
  9. 170
  10. 135
  11. 330
  12. 1900
  13. 2800
  14. 415
  15. 4450
  16. 1500
  17. 65
  18. 1250
  19. 1600
  20. 1550
  21. 195
  22. 85
  23. 90
  24. 1000
  25. 1000
  26. 3550
  27. 1750
  28. 385
  29. 335
  30. 220
  31. 4050
  32. 290
  33. 3700
  34. 285
  35. 335
  36. 1250
  37. 310
  38. 135
  39. 1750
  40. 85

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