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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 367 · 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. 1.29 × 5 =
  2. 2.91 × 5 =
  3. 3.27 × 5 =
  4. 4.12 × 50 =
  5. 5.16 × 5 =
  6. 6.97 × 50 =
  7. 7.81 × 5 =
  8. 8.44 × 50 =
  9. 9.69 × 5 =
  10. 10.49 × 50 =
  11. 11.57 × 5 =
  12. 12.54 × 50 =
  13. 13.25 × 5 =
  14. 14.79 × 5 =
  15. 15.86 × 5 =
  16. 16.89 × 5 =
  17. 17.88 × 50 =
  18. 18.79 × 5 =
  19. 19.91 × 5 =
  20. 20.31 × 5 =
  21. 21.69 × 5 =
  22. 22.76 × 5 =
  23. 23.19 × 50 =
  24. 24.83 × 5 =
  25. 25.78 × 5 =
  26. 26.73 × 5 =
  27. 27.12 × 5 =
  28. 28.27 × 50 =
  29. 29.55 × 50 =
  30. 30.47 × 50 =
  31. 31.81 × 50 =
  32. 32.59 × 50 =
  33. 33.87 × 50 =
  34. 34.74 × 5 =
  35. 35.20 × 5 =
  36. 36.96 × 5 =
  37. 37.28 × 50 =
  38. 38.63 × 50 =
  39. 39.50 × 5 =
  40. 40.49 × 50 =

Answer key

  1. 145
  2. 455
  3. 135
  4. 600
  5. 80
  6. 4850
  7. 405
  8. 2200
  9. 345
  10. 2450
  11. 285
  12. 2700
  13. 125
  14. 395
  15. 430
  16. 445
  17. 4400
  18. 395
  19. 455
  20. 155
  21. 345
  22. 380
  23. 950
  24. 415
  25. 390
  26. 365
  27. 60
  28. 1350
  29. 2750
  30. 2350
  31. 4050
  32. 2950
  33. 4350
  34. 370
  35. 100
  36. 480
  37. 1400
  38. 3150
  39. 250
  40. 2450

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