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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 523 · 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. 1.87 × 5 =
  2. 2.64 × 50 =
  3. 3.68 × 5 =
  4. 4.16 × 50 =
  5. 5.87 × 50 =
  6. 6.17 × 50 =
  7. 7.12 × 5 =
  8. 8.81 × 5 =
  9. 9.52 × 5 =
  10. 10.23 × 5 =
  11. 11.14 × 5 =
  12. 12.31 × 5 =
  13. 13.57 × 50 =
  14. 14.66 × 5 =
  15. 15.54 × 50 =
  16. 16.87 × 5 =
  17. 17.68 × 5 =
  18. 18.44 × 50 =
  19. 19.55 × 5 =
  20. 20.68 × 50 =
  21. 21.23 × 50 =
  22. 22.55 × 50 =
  23. 23.79 × 5 =
  24. 24.75 × 5 =
  25. 25.18 × 5 =
  26. 26.72 × 50 =
  27. 27.25 × 50 =
  28. 28.43 × 50 =
  29. 29.84 × 5 =
  30. 30.54 × 5 =
  31. 31.71 × 50 =
  32. 32.14 × 5 =
  33. 33.17 × 5 =
  34. 34.25 × 5 =
  35. 35.14 × 50 =
  36. 36.35 × 50 =
  37. 37.30 × 5 =
  38. 38.41 × 50 =
  39. 39.14 × 50 =
  40. 40.30 × 5 =

Answer key

  1. 435
  2. 3200
  3. 340
  4. 800
  5. 4350
  6. 850
  7. 60
  8. 405
  9. 260
  10. 115
  11. 70
  12. 155
  13. 2850
  14. 330
  15. 2700
  16. 435
  17. 340
  18. 2200
  19. 275
  20. 3400
  21. 1150
  22. 2750
  23. 395
  24. 375
  25. 90
  26. 3600
  27. 1250
  28. 2150
  29. 420
  30. 270
  31. 3550
  32. 70
  33. 85
  34. 125
  35. 700
  36. 1750
  37. 150
  38. 2050
  39. 700
  40. 150

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