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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 378 · 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. 1.30 × 50 =
  2. 2.68 × 5 =
  3. 3.16 × 5 =
  4. 4.84 × 5 =
  5. 5.58 × 5 =
  6. 6.60 × 5 =
  7. 7.69 × 5 =
  8. 8.88 × 5 =
  9. 9.86 × 5 =
  10. 10.66 × 5 =
  11. 11.35 × 50 =
  12. 12.95 × 5 =
  13. 13.54 × 50 =
  14. 14.70 × 50 =
  15. 15.13 × 50 =
  16. 16.30 × 50 =
  17. 17.18 × 5 =
  18. 18.27 × 50 =
  19. 19.79 × 5 =
  20. 20.43 × 50 =
  21. 21.31 × 50 =
  22. 22.91 × 5 =
  23. 23.68 × 50 =
  24. 24.83 × 50 =
  25. 25.76 × 50 =
  26. 26.26 × 5 =
  27. 27.59 × 50 =
  28. 28.95 × 5 =
  29. 29.17 × 5 =
  30. 30.83 × 5 =
  31. 31.42 × 50 =
  32. 32.21 × 5 =
  33. 33.28 × 5 =
  34. 34.16 × 5 =
  35. 35.92 × 50 =
  36. 36.26 × 50 =
  37. 37.76 × 5 =
  38. 38.85 × 50 =
  39. 39.28 × 50 =
  40. 40.70 × 5 =

Answer key

  1. 1500
  2. 340
  3. 80
  4. 420
  5. 290
  6. 300
  7. 345
  8. 440
  9. 430
  10. 330
  11. 1750
  12. 475
  13. 2700
  14. 3500
  15. 650
  16. 1500
  17. 90
  18. 1350
  19. 395
  20. 2150
  21. 1550
  22. 455
  23. 3400
  24. 4150
  25. 3800
  26. 130
  27. 2950
  28. 475
  29. 85
  30. 415
  31. 2100
  32. 105
  33. 140
  34. 80
  35. 4600
  36. 1300
  37. 380
  38. 4250
  39. 1400
  40. 350

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