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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 443 · 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. 1.70 × 5 =
  2. 2.13 × 50 =
  3. 3.51 × 50 =
  4. 4.71 × 50 =
  5. 5.59 × 50 =
  6. 6.24 × 5 =
  7. 7.79 × 50 =
  8. 8.20 × 5 =
  9. 9.88 × 50 =
  10. 10.65 × 50 =
  11. 11.20 × 50 =
  12. 12.61 × 5 =
  13. 13.46 × 5 =
  14. 14.46 × 5 =
  15. 15.22 × 50 =
  16. 16.20 × 50 =
  17. 17.40 × 50 =
  18. 18.38 × 5 =
  19. 19.13 × 5 =
  20. 20.48 × 5 =
  21. 21.30 × 5 =
  22. 22.71 × 50 =
  23. 23.62 × 50 =
  24. 24.76 × 50 =
  25. 25.73 × 5 =
  26. 26.65 × 5 =
  27. 27.71 × 5 =
  28. 28.36 × 5 =
  29. 29.84 × 5 =
  30. 30.17 × 50 =
  31. 31.17 × 50 =
  32. 32.53 × 5 =
  33. 33.56 × 5 =
  34. 34.82 × 50 =
  35. 35.76 × 50 =
  36. 36.33 × 5 =
  37. 37.69 × 50 =
  38. 38.43 × 5 =
  39. 39.94 × 50 =
  40. 40.14 × 50 =

Answer key

  1. 350
  2. 650
  3. 2550
  4. 3550
  5. 2950
  6. 120
  7. 3950
  8. 100
  9. 4400
  10. 3250
  11. 1000
  12. 305
  13. 230
  14. 230
  15. 1100
  16. 1000
  17. 2000
  18. 190
  19. 65
  20. 240
  21. 150
  22. 3550
  23. 3100
  24. 3800
  25. 365
  26. 325
  27. 355
  28. 180
  29. 420
  30. 850
  31. 850
  32. 265
  33. 280
  34. 4100
  35. 3800
  36. 165
  37. 3450
  38. 215
  39. 4700
  40. 700

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