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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 439 · 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. 1.86 × 50 =
  2. 2.18 × 50 =
  3. 3.36 × 50 =
  4. 4.62 × 5 =
  5. 5.71 × 50 =
  6. 6.22 × 5 =
  7. 7.72 × 50 =
  8. 8.78 × 50 =
  9. 9.82 × 50 =
  10. 10.84 × 50 =
  11. 11.36 × 5 =
  12. 12.45 × 50 =
  13. 13.78 × 5 =
  14. 14.74 × 5 =
  15. 15.56 × 5 =
  16. 16.12 × 5 =
  17. 17.34 × 5 =
  18. 18.82 × 50 =
  19. 19.44 × 50 =
  20. 20.19 × 50 =
  21. 21.68 × 5 =
  22. 22.23 × 5 =
  23. 23.32 × 5 =
  24. 24.97 × 50 =
  25. 25.48 × 5 =
  26. 26.77 × 50 =
  27. 27.86 × 50 =
  28. 28.42 × 50 =
  29. 29.70 × 50 =
  30. 30.16 × 50 =
  31. 31.43 × 5 =
  32. 32.80 × 50 =
  33. 33.59 × 5 =
  34. 34.45 × 5 =
  35. 35.49 × 5 =
  36. 36.89 × 50 =
  37. 37.70 × 5 =
  38. 38.43 × 50 =
  39. 39.18 × 5 =
  40. 40.91 × 50 =

Answer key

  1. 4300
  2. 900
  3. 1800
  4. 310
  5. 3550
  6. 110
  7. 3600
  8. 3900
  9. 4100
  10. 4200
  11. 180
  12. 2250
  13. 390
  14. 370
  15. 280
  16. 60
  17. 170
  18. 4100
  19. 2200
  20. 950
  21. 340
  22. 115
  23. 160
  24. 4850
  25. 240
  26. 3850
  27. 4300
  28. 2100
  29. 3500
  30. 800
  31. 215
  32. 4000
  33. 295
  34. 225
  35. 245
  36. 4450
  37. 350
  38. 2150
  39. 90
  40. 4550

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