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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 225 · 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. 1.54 × 5 =
  2. 2.97 × 5 =
  3. 3.59 × 50 =
  4. 4.56 × 5 =
  5. 5.91 × 50 =
  6. 6.16 × 50 =
  7. 7.17 × 5 =
  8. 8.25 × 5 =
  9. 9.56 × 50 =
  10. 10.98 × 50 =
  11. 11.81 × 5 =
  12. 12.70 × 5 =
  13. 13.98 × 50 =
  14. 14.15 × 5 =
  15. 15.92 × 5 =
  16. 16.48 × 5 =
  17. 17.33 × 50 =
  18. 18.93 × 5 =
  19. 19.98 × 50 =
  20. 20.13 × 50 =
  21. 21.60 × 5 =
  22. 22.16 × 50 =
  23. 23.21 × 50 =
  24. 24.83 × 50 =
  25. 25.25 × 5 =
  26. 26.48 × 50 =
  27. 27.57 × 5 =
  28. 28.83 × 50 =
  29. 29.85 × 5 =
  30. 30.35 × 5 =
  31. 31.74 × 5 =
  32. 32.79 × 50 =
  33. 33.40 × 5 =
  34. 34.34 × 5 =
  35. 35.95 × 5 =
  36. 36.43 × 5 =
  37. 37.44 × 5 =
  38. 38.54 × 50 =
  39. 39.36 × 50 =
  40. 40.78 × 5 =

Answer key

  1. 270
  2. 485
  3. 2950
  4. 280
  5. 4550
  6. 800
  7. 85
  8. 125
  9. 2800
  10. 4900
  11. 405
  12. 350
  13. 4900
  14. 75
  15. 460
  16. 240
  17. 1650
  18. 465
  19. 4900
  20. 650
  21. 300
  22. 800
  23. 1050
  24. 4150
  25. 125
  26. 2400
  27. 285
  28. 4150
  29. 425
  30. 175
  31. 370
  32. 3950
  33. 200
  34. 170
  35. 475
  36. 215
  37. 220
  38. 2700
  39. 1800
  40. 390

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