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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 751 · 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. 1.31 × 50 =
  2. 2.53 × 5 =
  3. 3.72 × 50 =
  4. 4.53 × 50 =
  5. 5.71 × 50 =
  6. 6.71 × 5 =
  7. 7.18 × 5 =
  8. 8.42 × 5 =
  9. 9.34 × 5 =
  10. 10.21 × 50 =
  11. 11.91 × 5 =
  12. 12.26 × 5 =
  13. 13.28 × 5 =
  14. 14.43 × 50 =
  15. 15.84 × 50 =
  16. 16.76 × 50 =
  17. 17.54 × 5 =
  18. 18.26 × 50 =
  19. 19.35 × 50 =
  20. 20.28 × 5 =
  21. 21.19 × 50 =
  22. 22.63 × 5 =
  23. 23.41 × 50 =
  24. 24.72 × 5 =
  25. 25.80 × 5 =
  26. 26.70 × 50 =
  27. 27.68 × 50 =
  28. 28.83 × 50 =
  29. 29.57 × 5 =
  30. 30.45 × 50 =
  31. 31.50 × 5 =
  32. 32.85 × 50 =
  33. 33.76 × 5 =
  34. 34.34 × 5 =
  35. 35.18 × 5 =
  36. 36.31 × 50 =
  37. 37.36 × 5 =
  38. 38.28 × 5 =
  39. 39.76 × 50 =
  40. 40.39 × 5 =

Answer key

  1. 1550
  2. 265
  3. 3600
  4. 2650
  5. 3550
  6. 355
  7. 90
  8. 210
  9. 170
  10. 1050
  11. 455
  12. 130
  13. 140
  14. 2150
  15. 4200
  16. 3800
  17. 270
  18. 1300
  19. 1750
  20. 140
  21. 950
  22. 315
  23. 2050
  24. 360
  25. 400
  26. 3500
  27. 3400
  28. 4150
  29. 285
  30. 2250
  31. 250
  32. 4250
  33. 380
  34. 170
  35. 90
  36. 1550
  37. 180
  38. 140
  39. 3800
  40. 195

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