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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 24 · 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. 2.26 × 50 =
  3. 3.81 × 50 =
  4. 4.68 × 50 =
  5. 5.81 × 50 =
  6. 6.28 × 5 =
  7. 7.55 × 5 =
  8. 8.54 × 50 =
  9. 9.62 × 50 =
  10. 10.90 × 5 =
  11. 11.74 × 50 =
  12. 12.14 × 5 =
  13. 13.44 × 50 =
  14. 14.83 × 50 =
  15. 15.51 × 50 =
  16. 16.64 × 50 =
  17. 17.26 × 5 =
  18. 18.50 × 5 =
  19. 19.68 × 50 =
  20. 20.89 × 5 =
  21. 21.70 × 50 =
  22. 22.63 × 5 =
  23. 23.70 × 5 =
  24. 24.18 × 50 =
  25. 25.25 × 50 =
  26. 26.20 × 50 =
  27. 27.14 × 5 =
  28. 28.23 × 5 =
  29. 29.77 × 50 =
  30. 30.79 × 5 =
  31. 31.49 × 50 =
  32. 32.20 × 50 =
  33. 33.12 × 50 =
  34. 34.18 × 50 =
  35. 35.75 × 5 =
  36. 36.44 × 5 =
  37. 37.33 × 5 =
  38. 38.22 × 50 =
  39. 39.85 × 50 =
  40. 40.40 × 5 =

Answer key

  1. 3950
  2. 1300
  3. 4050
  4. 3400
  5. 4050
  6. 140
  7. 275
  8. 2700
  9. 3100
  10. 450
  11. 3700
  12. 70
  13. 2200
  14. 4150
  15. 2550
  16. 3200
  17. 130
  18. 250
  19. 3400
  20. 445
  21. 3500
  22. 315
  23. 350
  24. 900
  25. 1250
  26. 1000
  27. 70
  28. 115
  29. 3850
  30. 395
  31. 2450
  32. 1000
  33. 600
  34. 900
  35. 375
  36. 220
  37. 165
  38. 1100
  39. 4250
  40. 200

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