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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 9 · 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. 1.91 × 50 =
  2. 2.23 × 5 =
  3. 3.89 × 5 =
  4. 4.67 × 5 =
  5. 5.71 × 5 =
  6. 6.90 × 5 =
  7. 7.18 × 5 =
  8. 8.86 × 5 =
  9. 9.21 × 5 =
  10. 10.16 × 5 =
  11. 11.55 × 5 =
  12. 12.12 × 50 =
  13. 13.66 × 5 =
  14. 14.56 × 5 =
  15. 15.39 × 5 =
  16. 16.56 × 50 =
  17. 17.73 × 5 =
  18. 18.77 × 5 =
  19. 19.60 × 50 =
  20. 20.79 × 50 =
  21. 21.96 × 5 =
  22. 22.73 × 5 =
  23. 23.94 × 50 =
  24. 24.43 × 5 =
  25. 25.23 × 5 =
  26. 26.13 × 5 =
  27. 27.67 × 50 =
  28. 28.95 × 50 =
  29. 29.32 × 50 =
  30. 30.90 × 50 =
  31. 31.29 × 50 =
  32. 32.38 × 5 =
  33. 33.24 × 5 =
  34. 34.79 × 5 =
  35. 35.71 × 50 =
  36. 36.32 × 5 =
  37. 37.57 × 50 =
  38. 38.29 × 5 =
  39. 39.58 × 50 =
  40. 40.72 × 5 =

Answer key

  1. 4550
  2. 115
  3. 445
  4. 335
  5. 355
  6. 450
  7. 90
  8. 430
  9. 105
  10. 80
  11. 275
  12. 600
  13. 330
  14. 280
  15. 195
  16. 2800
  17. 365
  18. 385
  19. 3000
  20. 3950
  21. 480
  22. 365
  23. 4700
  24. 215
  25. 115
  26. 65
  27. 3350
  28. 4750
  29. 1600
  30. 4500
  31. 1450
  32. 190
  33. 120
  34. 395
  35. 3550
  36. 160
  37. 2850
  38. 145
  39. 2900
  40. 360

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