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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 507 · 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. 1.76 × 50 =
  2. 2.23 × 50 =
  3. 3.55 × 50 =
  4. 4.91 × 5 =
  5. 5.57 × 5 =
  6. 6.31 × 5 =
  7. 7.85 × 5 =
  8. 8.35 × 50 =
  9. 9.16 × 5 =
  10. 10.16 × 50 =
  11. 11.25 × 50 =
  12. 12.93 × 50 =
  13. 13.43 × 50 =
  14. 14.97 × 50 =
  15. 15.98 × 50 =
  16. 16.80 × 5 =
  17. 17.75 × 50 =
  18. 18.41 × 5 =
  19. 19.16 × 5 =
  20. 20.48 × 5 =
  21. 21.50 × 5 =
  22. 22.97 × 50 =
  23. 23.66 × 5 =
  24. 24.86 × 50 =
  25. 25.19 × 5 =
  26. 26.96 × 50 =
  27. 27.17 × 5 =
  28. 28.49 × 50 =
  29. 29.43 × 50 =
  30. 30.67 × 50 =
  31. 31.96 × 5 =
  32. 32.70 × 50 =
  33. 33.33 × 50 =
  34. 34.14 × 5 =
  35. 35.25 × 5 =
  36. 36.40 × 50 =
  37. 37.81 × 50 =
  38. 38.67 × 5 =
  39. 39.97 × 5 =
  40. 40.28 × 50 =

Answer key

  1. 3800
  2. 1150
  3. 2750
  4. 455
  5. 285
  6. 155
  7. 425
  8. 1750
  9. 80
  10. 800
  11. 1250
  12. 4650
  13. 2150
  14. 4850
  15. 4900
  16. 400
  17. 3750
  18. 205
  19. 80
  20. 240
  21. 250
  22. 4850
  23. 330
  24. 4300
  25. 95
  26. 4800
  27. 85
  28. 2450
  29. 2150
  30. 3350
  31. 480
  32. 3500
  33. 1650
  34. 70
  35. 125
  36. 2000
  37. 4050
  38. 335
  39. 485
  40. 1400

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