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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 268 · 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. 1.51 × 5 =
  2. 2.25 × 50 =
  3. 3.36 × 50 =
  4. 4.74 × 5 =
  5. 5.39 × 50 =
  6. 6.26 × 5 =
  7. 7.59 × 5 =
  8. 8.40 × 50 =
  9. 9.34 × 5 =
  10. 10.19 × 5 =
  11. 11.31 × 5 =
  12. 12.21 × 5 =
  13. 13.83 × 5 =
  14. 14.74 × 5 =
  15. 15.33 × 50 =
  16. 16.55 × 5 =
  17. 17.45 × 5 =
  18. 18.81 × 5 =
  19. 19.26 × 5 =
  20. 20.17 × 5 =
  21. 21.84 × 5 =
  22. 22.26 × 5 =
  23. 23.47 × 50 =
  24. 24.80 × 5 =
  25. 25.14 × 5 =
  26. 26.89 × 5 =
  27. 27.66 × 5 =
  28. 28.32 × 50 =
  29. 29.18 × 50 =
  30. 30.14 × 50 =
  31. 31.62 × 5 =
  32. 32.27 × 50 =
  33. 33.68 × 50 =
  34. 34.69 × 50 =
  35. 35.28 × 5 =
  36. 36.76 × 5 =
  37. 37.78 × 5 =
  38. 38.34 × 50 =
  39. 39.68 × 50 =
  40. 40.17 × 50 =

Answer key

  1. 255
  2. 1250
  3. 1800
  4. 370
  5. 1950
  6. 130
  7. 295
  8. 2000
  9. 170
  10. 95
  11. 155
  12. 105
  13. 415
  14. 370
  15. 1650
  16. 275
  17. 225
  18. 405
  19. 130
  20. 85
  21. 420
  22. 130
  23. 2350
  24. 400
  25. 70
  26. 445
  27. 330
  28. 1600
  29. 900
  30. 700
  31. 310
  32. 1350
  33. 3400
  34. 3450
  35. 140
  36. 380
  37. 390
  38. 1700
  39. 3400
  40. 850

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