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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 444 · 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. 1.74 × 50 =
  2. 2.52 × 50 =
  3. 3.30 × 5 =
  4. 4.17 × 5 =
  5. 5.70 × 5 =
  6. 6.89 × 5 =
  7. 7.37 × 5 =
  8. 8.32 × 5 =
  9. 9.19 × 50 =
  10. 10.89 × 50 =
  11. 11.22 × 50 =
  12. 12.26 × 50 =
  13. 13.15 × 50 =
  14. 14.75 × 5 =
  15. 15.29 × 5 =
  16. 16.20 × 5 =
  17. 17.66 × 50 =
  18. 18.50 × 5 =
  19. 19.95 × 5 =
  20. 20.16 × 5 =
  21. 21.43 × 5 =
  22. 22.88 × 50 =
  23. 23.64 × 5 =
  24. 24.43 × 5 =
  25. 25.12 × 50 =
  26. 26.92 × 5 =
  27. 27.97 × 50 =
  28. 28.54 × 50 =
  29. 29.66 × 5 =
  30. 30.91 × 50 =
  31. 31.89 × 5 =
  32. 32.29 × 50 =
  33. 33.80 × 5 =
  34. 34.64 × 50 =
  35. 35.12 × 5 =
  36. 36.66 × 5 =
  37. 37.61 × 5 =
  38. 38.67 × 50 =
  39. 39.90 × 50 =
  40. 40.39 × 50 =

Answer key

  1. 3700
  2. 2600
  3. 150
  4. 85
  5. 350
  6. 445
  7. 185
  8. 160
  9. 950
  10. 4450
  11. 1100
  12. 1300
  13. 750
  14. 375
  15. 145
  16. 100
  17. 3300
  18. 250
  19. 475
  20. 80
  21. 215
  22. 4400
  23. 320
  24. 215
  25. 600
  26. 460
  27. 4850
  28. 2700
  29. 330
  30. 4550
  31. 445
  32. 1450
  33. 400
  34. 3200
  35. 60
  36. 330
  37. 305
  38. 3350
  39. 4500
  40. 1950

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