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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 708 · 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. 1.45 × 5 =
  2. 2.49 × 5 =
  3. 3.13 × 50 =
  4. 4.78 × 5 =
  5. 5.65 × 50 =
  6. 6.87 × 50 =
  7. 7.49 × 50 =
  8. 8.97 × 50 =
  9. 9.85 × 5 =
  10. 10.30 × 50 =
  11. 11.32 × 50 =
  12. 12.73 × 50 =
  13. 13.93 × 50 =
  14. 14.86 × 5 =
  15. 15.30 × 50 =
  16. 16.46 × 5 =
  17. 17.32 × 50 =
  18. 18.60 × 50 =
  19. 19.14 × 50 =
  20. 20.28 × 5 =
  21. 21.95 × 5 =
  22. 22.71 × 50 =
  23. 23.33 × 5 =
  24. 24.23 × 5 =
  25. 25.71 × 5 =
  26. 26.16 × 5 =
  27. 27.81 × 5 =
  28. 28.54 × 50 =
  29. 29.79 × 5 =
  30. 30.65 × 50 =
  31. 31.30 × 5 =
  32. 32.78 × 5 =
  33. 33.32 × 5 =
  34. 34.35 × 50 =
  35. 35.39 × 50 =
  36. 36.56 × 50 =
  37. 37.78 × 50 =
  38. 38.92 × 50 =
  39. 39.36 × 5 =
  40. 40.58 × 5 =

Answer key

  1. 225
  2. 245
  3. 650
  4. 390
  5. 3250
  6. 4350
  7. 2450
  8. 4850
  9. 425
  10. 1500
  11. 1600
  12. 3650
  13. 4650
  14. 430
  15. 1500
  16. 230
  17. 1600
  18. 3000
  19. 700
  20. 140
  21. 475
  22. 3550
  23. 165
  24. 115
  25. 355
  26. 80
  27. 405
  28. 2700
  29. 395
  30. 3250
  31. 150
  32. 390
  33. 160
  34. 1750
  35. 1950
  36. 2800
  37. 3900
  38. 4600
  39. 180
  40. 290

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