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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 187 · 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. 1.50 × 5 =
  2. 2.23 × 5 =
  3. 3.37 × 50 =
  4. 4.31 × 50 =
  5. 5.66 × 5 =
  6. 6.57 × 50 =
  7. 7.42 × 50 =
  8. 8.84 × 5 =
  9. 9.17 × 50 =
  10. 10.80 × 5 =
  11. 11.41 × 5 =
  12. 12.85 × 5 =
  13. 13.23 × 50 =
  14. 14.28 × 5 =
  15. 15.67 × 5 =
  16. 16.46 × 5 =
  17. 17.42 × 5 =
  18. 18.28 × 50 =
  19. 19.83 × 50 =
  20. 20.63 × 5 =
  21. 21.94 × 50 =
  22. 22.55 × 5 =
  23. 23.32 × 5 =
  24. 24.33 × 5 =
  25. 25.83 × 5 =
  26. 26.29 × 50 =
  27. 27.89 × 5 =
  28. 28.31 × 5 =
  29. 29.79 × 5 =
  30. 30.21 × 50 =
  31. 31.13 × 50 =
  32. 32.71 × 50 =
  33. 33.13 × 50 =
  34. 34.94 × 5 =
  35. 35.20 × 50 =
  36. 36.64 × 5 =
  37. 37.64 × 5 =
  38. 38.91 × 5 =
  39. 39.12 × 50 =
  40. 40.36 × 50 =

Answer key

  1. 250
  2. 115
  3. 1850
  4. 1550
  5. 330
  6. 2850
  7. 2100
  8. 420
  9. 850
  10. 400
  11. 205
  12. 425
  13. 1150
  14. 140
  15. 335
  16. 230
  17. 210
  18. 1400
  19. 4150
  20. 315
  21. 4700
  22. 275
  23. 160
  24. 165
  25. 415
  26. 1450
  27. 445
  28. 155
  29. 395
  30. 1050
  31. 650
  32. 3550
  33. 650
  34. 470
  35. 1000
  36. 320
  37. 320
  38. 455
  39. 600
  40. 1800

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