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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 407 · 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. 1.63 × 5 =
  2. 2.71 × 50 =
  3. 3.64 × 50 =
  4. 4.73 × 50 =
  5. 5.75 × 50 =
  6. 6.32 × 5 =
  7. 7.76 × 50 =
  8. 8.66 × 5 =
  9. 9.50 × 50 =
  10. 10.35 × 50 =
  11. 11.81 × 5 =
  12. 12.26 × 50 =
  13. 13.22 × 50 =
  14. 14.30 × 5 =
  15. 15.51 × 5 =
  16. 16.32 × 5 =
  17. 17.17 × 50 =
  18. 18.37 × 50 =
  19. 19.82 × 50 =
  20. 20.98 × 5 =
  21. 21.43 × 5 =
  22. 22.14 × 50 =
  23. 23.70 × 5 =
  24. 24.63 × 50 =
  25. 25.74 × 50 =
  26. 26.59 × 5 =
  27. 27.82 × 50 =
  28. 28.25 × 5 =
  29. 29.90 × 50 =
  30. 30.20 × 5 =
  31. 31.78 × 50 =
  32. 32.19 × 5 =
  33. 33.38 × 50 =
  34. 34.84 × 50 =
  35. 35.81 × 5 =
  36. 36.69 × 5 =
  37. 37.76 × 50 =
  38. 38.13 × 50 =
  39. 39.57 × 50 =
  40. 40.58 × 5 =

Answer key

  1. 315
  2. 3550
  3. 3200
  4. 3650
  5. 3750
  6. 160
  7. 3800
  8. 330
  9. 2500
  10. 1750
  11. 405
  12. 1300
  13. 1100
  14. 150
  15. 255
  16. 160
  17. 850
  18. 1850
  19. 4100
  20. 490
  21. 215
  22. 700
  23. 350
  24. 3150
  25. 3700
  26. 295
  27. 4100
  28. 125
  29. 4500
  30. 100
  31. 3900
  32. 95
  33. 1900
  34. 4200
  35. 405
  36. 345
  37. 3800
  38. 650
  39. 2850
  40. 290

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