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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 471 · 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. 1.61 × 5 =
  2. 2.30 × 50 =
  3. 3.25 × 5 =
  4. 4.42 × 50 =
  5. 5.97 × 50 =
  6. 6.31 × 5 =
  7. 7.36 × 50 =
  8. 8.48 × 5 =
  9. 9.77 × 5 =
  10. 10.77 × 5 =
  11. 11.39 × 5 =
  12. 12.35 × 50 =
  13. 13.59 × 50 =
  14. 14.83 × 50 =
  15. 15.77 × 5 =
  16. 16.28 × 5 =
  17. 17.31 × 50 =
  18. 18.59 × 5 =
  19. 19.23 × 50 =
  20. 20.24 × 50 =
  21. 21.61 × 50 =
  22. 22.53 × 5 =
  23. 23.14 × 5 =
  24. 24.14 × 5 =
  25. 25.22 × 5 =
  26. 26.71 × 5 =
  27. 27.87 × 5 =
  28. 28.52 × 5 =
  29. 29.19 × 5 =
  30. 30.20 × 50 =
  31. 31.56 × 50 =
  32. 32.80 × 5 =
  33. 33.66 × 50 =
  34. 34.35 × 5 =
  35. 35.25 × 5 =
  36. 36.42 × 50 =
  37. 37.84 × 5 =
  38. 38.87 × 5 =
  39. 39.44 × 50 =
  40. 40.90 × 5 =

Answer key

  1. 305
  2. 1500
  3. 125
  4. 2100
  5. 4850
  6. 155
  7. 1800
  8. 240
  9. 385
  10. 385
  11. 195
  12. 1750
  13. 2950
  14. 4150
  15. 385
  16. 140
  17. 1550
  18. 295
  19. 1150
  20. 1200
  21. 3050
  22. 265
  23. 70
  24. 70
  25. 110
  26. 355
  27. 435
  28. 260
  29. 95
  30. 1000
  31. 2800
  32. 400
  33. 3300
  34. 175
  35. 125
  36. 2100
  37. 420
  38. 435
  39. 2200
  40. 450

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