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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 161 · 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. 1.36 × 50 =
  2. 2.46 × 5 =
  3. 3.21 × 50 =
  4. 4.42 × 50 =
  5. 5.96 × 50 =
  6. 6.90 × 5 =
  7. 7.62 × 50 =
  8. 8.31 × 5 =
  9. 9.15 × 50 =
  10. 10.88 × 5 =
  11. 11.47 × 50 =
  12. 12.71 × 5 =
  13. 13.48 × 5 =
  14. 14.57 × 5 =
  15. 15.90 × 5 =
  16. 16.68 × 50 =
  17. 17.88 × 5 =
  18. 18.45 × 50 =
  19. 19.77 × 5 =
  20. 20.36 × 5 =
  21. 21.24 × 5 =
  22. 22.32 × 5 =
  23. 23.66 × 5 =
  24. 24.81 × 5 =
  25. 25.45 × 5 =
  26. 26.84 × 5 =
  27. 27.78 × 50 =
  28. 28.71 × 50 =
  29. 29.29 × 50 =
  30. 30.26 × 50 =
  31. 31.54 × 5 =
  32. 32.72 × 50 =
  33. 33.65 × 50 =
  34. 34.39 × 50 =
  35. 35.20 × 5 =
  36. 36.75 × 50 =
  37. 37.19 × 5 =
  38. 38.37 × 50 =
  39. 39.47 × 5 =
  40. 40.77 × 5 =

Answer key

  1. 1800
  2. 230
  3. 1050
  4. 2100
  5. 4800
  6. 450
  7. 3100
  8. 155
  9. 750
  10. 440
  11. 2350
  12. 355
  13. 240
  14. 285
  15. 450
  16. 3400
  17. 440
  18. 2250
  19. 385
  20. 180
  21. 120
  22. 160
  23. 330
  24. 405
  25. 225
  26. 420
  27. 3900
  28. 3550
  29. 1450
  30. 1300
  31. 270
  32. 3600
  33. 3250
  34. 1950
  35. 100
  36. 3750
  37. 95
  38. 1850
  39. 235
  40. 385

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