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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 215 · 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. 1.75 × 50 =
  2. 2.31 × 5 =
  3. 3.61 × 5 =
  4. 4.95 × 5 =
  5. 5.34 × 50 =
  6. 6.21 × 5 =
  7. 7.39 × 50 =
  8. 8.34 × 50 =
  9. 9.56 × 5 =
  10. 10.74 × 5 =
  11. 11.71 × 50 =
  12. 12.17 × 5 =
  13. 13.69 × 50 =
  14. 14.57 × 50 =
  15. 15.55 × 5 =
  16. 16.29 × 50 =
  17. 17.19 × 50 =
  18. 18.35 × 5 =
  19. 19.58 × 50 =
  20. 20.70 × 5 =
  21. 21.90 × 5 =
  22. 22.57 × 50 =
  23. 23.80 × 5 =
  24. 24.75 × 50 =
  25. 25.25 × 50 =
  26. 26.78 × 50 =
  27. 27.98 × 50 =
  28. 28.39 × 5 =
  29. 29.84 × 50 =
  30. 30.59 × 50 =
  31. 31.71 × 5 =
  32. 32.36 × 5 =
  33. 33.49 × 50 =
  34. 34.82 × 50 =
  35. 35.85 × 5 =
  36. 36.60 × 5 =
  37. 37.36 × 5 =
  38. 38.55 × 5 =
  39. 39.78 × 50 =
  40. 40.40 × 50 =

Answer key

  1. 3750
  2. 155
  3. 305
  4. 475
  5. 1700
  6. 105
  7. 1950
  8. 1700
  9. 280
  10. 370
  11. 3550
  12. 85
  13. 3450
  14. 2850
  15. 275
  16. 1450
  17. 950
  18. 175
  19. 2900
  20. 350
  21. 450
  22. 2850
  23. 400
  24. 3750
  25. 1250
  26. 3900
  27. 4900
  28. 195
  29. 4200
  30. 2950
  31. 355
  32. 180
  33. 2450
  34. 4100
  35. 425
  36. 300
  37. 180
  38. 275
  39. 3900
  40. 2000

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