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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 59 · 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. 1.38 × 5 =
  2. 2.72 × 5 =
  3. 3.83 × 5 =
  4. 4.88 × 5 =
  5. 5.83 × 50 =
  6. 6.16 × 50 =
  7. 7.63 × 50 =
  8. 8.94 × 5 =
  9. 9.47 × 5 =
  10. 10.16 × 5 =
  11. 11.84 × 5 =
  12. 12.15 × 50 =
  13. 13.68 × 50 =
  14. 14.52 × 50 =
  15. 15.18 × 5 =
  16. 16.13 × 5 =
  17. 17.38 × 5 =
  18. 18.62 × 50 =
  19. 19.17 × 50 =
  20. 20.20 × 50 =
  21. 21.15 × 50 =
  22. 22.19 × 5 =
  23. 23.20 × 50 =
  24. 24.55 × 50 =
  25. 25.15 × 50 =
  26. 26.87 × 5 =
  27. 27.25 × 50 =
  28. 28.62 × 50 =
  29. 29.20 × 50 =
  30. 30.16 × 50 =
  31. 31.64 × 5 =
  32. 32.23 × 50 =
  33. 33.48 × 50 =
  34. 34.35 × 50 =
  35. 35.60 × 5 =
  36. 36.82 × 5 =
  37. 37.94 × 50 =
  38. 38.45 × 50 =
  39. 39.36 × 5 =
  40. 40.86 × 5 =

Answer key

  1. 190
  2. 360
  3. 415
  4. 440
  5. 4150
  6. 800
  7. 3150
  8. 470
  9. 235
  10. 80
  11. 420
  12. 750
  13. 3400
  14. 2600
  15. 90
  16. 65
  17. 190
  18. 3100
  19. 850
  20. 1000
  21. 750
  22. 95
  23. 1000
  24. 2750
  25. 750
  26. 435
  27. 1250
  28. 3100
  29. 1000
  30. 800
  31. 320
  32. 1150
  33. 2400
  34. 1750
  35. 300
  36. 410
  37. 4700
  38. 2250
  39. 180
  40. 430

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