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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 758 · 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 × 50 =
  2. 2.31 × 50 =
  3. 3.88 × 5 =
  4. 4.56 × 50 =
  5. 5.14 × 50 =
  6. 6.83 × 50 =
  7. 7.78 × 50 =
  8. 8.87 × 5 =
  9. 9.47 × 5 =
  10. 10.51 × 5 =
  11. 11.66 × 50 =
  12. 12.34 × 5 =
  13. 13.60 × 50 =
  14. 14.43 × 5 =
  15. 15.52 × 5 =
  16. 16.38 × 50 =
  17. 17.21 × 5 =
  18. 18.19 × 50 =
  19. 19.95 × 50 =
  20. 20.84 × 50 =
  21. 21.75 × 5 =
  22. 22.17 × 5 =
  23. 23.63 × 5 =
  24. 24.38 × 5 =
  25. 25.57 × 5 =
  26. 26.84 × 50 =
  27. 27.79 × 5 =
  28. 28.69 × 50 =
  29. 29.54 × 50 =
  30. 30.82 × 50 =
  31. 31.64 × 5 =
  32. 32.71 × 50 =
  33. 33.42 × 50 =
  34. 34.85 × 50 =
  35. 35.40 × 50 =
  36. 36.50 × 5 =
  37. 37.85 × 5 =
  38. 38.83 × 5 =
  39. 39.49 × 5 =
  40. 40.38 × 50 =

Answer key

  1. 2550
  2. 1550
  3. 440
  4. 2800
  5. 700
  6. 4150
  7. 3900
  8. 435
  9. 235
  10. 255
  11. 3300
  12. 170
  13. 3000
  14. 215
  15. 260
  16. 1900
  17. 105
  18. 950
  19. 4750
  20. 4200
  21. 375
  22. 85
  23. 315
  24. 190
  25. 285
  26. 4200
  27. 395
  28. 3450
  29. 2700
  30. 4100
  31. 320
  32. 3550
  33. 2100
  34. 4250
  35. 2000
  36. 250
  37. 425
  38. 415
  39. 245
  40. 1900

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