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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 790 · 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. 1.89 × 50 =
  2. 2.13 × 50 =
  3. 3.59 × 50 =
  4. 4.86 × 50 =
  5. 5.42 × 5 =
  6. 6.73 × 5 =
  7. 7.27 × 5 =
  8. 8.14 × 50 =
  9. 9.82 × 5 =
  10. 10.57 × 5 =
  11. 11.97 × 5 =
  12. 12.95 × 5 =
  13. 13.60 × 50 =
  14. 14.97 × 50 =
  15. 15.59 × 5 =
  16. 16.79 × 5 =
  17. 17.89 × 50 =
  18. 18.86 × 5 =
  19. 19.31 × 50 =
  20. 20.57 × 50 =
  21. 21.42 × 5 =
  22. 22.33 × 5 =
  23. 23.87 × 5 =
  24. 24.43 × 5 =
  25. 25.66 × 5 =
  26. 26.67 × 50 =
  27. 27.35 × 5 =
  28. 28.22 × 50 =
  29. 29.62 × 50 =
  30. 30.75 × 5 =
  31. 31.33 × 5 =
  32. 32.38 × 5 =
  33. 33.34 × 5 =
  34. 34.79 × 50 =
  35. 35.93 × 50 =
  36. 36.71 × 50 =
  37. 37.25 × 50 =
  38. 38.12 × 50 =
  39. 39.60 × 50 =
  40. 40.39 × 50 =

Answer key

  1. 4450
  2. 650
  3. 2950
  4. 4300
  5. 210
  6. 365
  7. 135
  8. 700
  9. 410
  10. 285
  11. 485
  12. 475
  13. 3000
  14. 4850
  15. 295
  16. 395
  17. 4450
  18. 430
  19. 1550
  20. 2850
  21. 210
  22. 165
  23. 435
  24. 215
  25. 330
  26. 3350
  27. 175
  28. 1100
  29. 3100
  30. 375
  31. 165
  32. 190
  33. 170
  34. 3950
  35. 4650
  36. 3550
  37. 1250
  38. 600
  39. 3000
  40. 1950

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