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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 435 · 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. 1.15 × 50 =
  2. 2.25 × 5 =
  3. 3.45 × 50 =
  4. 4.90 × 5 =
  5. 5.84 × 50 =
  6. 6.98 × 5 =
  7. 7.34 × 5 =
  8. 8.32 × 50 =
  9. 9.77 × 5 =
  10. 10.91 × 5 =
  11. 11.37 × 50 =
  12. 12.49 × 5 =
  13. 13.76 × 5 =
  14. 14.97 × 5 =
  15. 15.63 × 5 =
  16. 16.76 × 50 =
  17. 17.80 × 50 =
  18. 18.20 × 5 =
  19. 19.49 × 50 =
  20. 20.38 × 50 =
  21. 21.93 × 50 =
  22. 22.41 × 50 =
  23. 23.28 × 50 =
  24. 24.32 × 5 =
  25. 25.43 × 50 =
  26. 26.37 × 5 =
  27. 27.20 × 50 =
  28. 28.96 × 50 =
  29. 29.48 × 5 =
  30. 30.71 × 50 =
  31. 31.40 × 5 =
  32. 32.67 × 50 =
  33. 33.18 × 5 =
  34. 34.44 × 5 =
  35. 35.89 × 5 =
  36. 36.59 × 50 =
  37. 37.33 × 50 =
  38. 38.43 × 5 =
  39. 39.16 × 5 =
  40. 40.83 × 5 =

Answer key

  1. 750
  2. 125
  3. 2250
  4. 450
  5. 4200
  6. 490
  7. 170
  8. 1600
  9. 385
  10. 455
  11. 1850
  12. 245
  13. 380
  14. 485
  15. 315
  16. 3800
  17. 4000
  18. 100
  19. 2450
  20. 1900
  21. 4650
  22. 2050
  23. 1400
  24. 160
  25. 2150
  26. 185
  27. 1000
  28. 4800
  29. 240
  30. 3550
  31. 200
  32. 3350
  33. 90
  34. 220
  35. 445
  36. 2950
  37. 1650
  38. 215
  39. 80
  40. 415

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