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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 238 · 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. 1.79 × 50 =
  2. 2.23 × 50 =
  3. 3.59 × 50 =
  4. 4.74 × 5 =
  5. 5.12 × 5 =
  6. 6.19 × 50 =
  7. 7.36 × 50 =
  8. 8.54 × 50 =
  9. 9.89 × 50 =
  10. 10.34 × 5 =
  11. 11.32 × 50 =
  12. 12.17 × 50 =
  13. 13.15 × 50 =
  14. 14.98 × 5 =
  15. 15.57 × 50 =
  16. 16.73 × 50 =
  17. 17.64 × 50 =
  18. 18.42 × 50 =
  19. 19.37 × 50 =
  20. 20.15 × 50 =
  21. 21.39 × 5 =
  22. 22.88 × 5 =
  23. 23.79 × 50 =
  24. 24.86 × 5 =
  25. 25.20 × 50 =
  26. 26.87 × 5 =
  27. 27.25 × 5 =
  28. 28.79 × 5 =
  29. 29.71 × 50 =
  30. 30.36 × 50 =
  31. 31.77 × 5 =
  32. 32.70 × 50 =
  33. 33.37 × 5 =
  34. 34.81 × 5 =
  35. 35.33 × 50 =
  36. 36.12 × 5 =
  37. 37.64 × 5 =
  38. 38.48 × 50 =
  39. 39.16 × 50 =
  40. 40.28 × 50 =

Answer key

  1. 3950
  2. 1150
  3. 2950
  4. 370
  5. 60
  6. 950
  7. 1800
  8. 2700
  9. 4450
  10. 170
  11. 1600
  12. 850
  13. 750
  14. 490
  15. 2850
  16. 3650
  17. 3200
  18. 2100
  19. 1850
  20. 750
  21. 195
  22. 440
  23. 3950
  24. 430
  25. 1000
  26. 435
  27. 125
  28. 395
  29. 3550
  30. 1800
  31. 385
  32. 3500
  33. 185
  34. 405
  35. 1650
  36. 60
  37. 320
  38. 2400
  39. 800
  40. 1400

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