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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 755 · 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. 1.46 × 50 =
  2. 2.16 × 50 =
  3. 3.52 × 5 =
  4. 4.93 × 5 =
  5. 5.21 × 5 =
  6. 6.60 × 50 =
  7. 7.53 × 50 =
  8. 8.12 × 5 =
  9. 9.64 × 5 =
  10. 10.26 × 50 =
  11. 11.17 × 5 =
  12. 12.37 × 5 =
  13. 13.90 × 50 =
  14. 14.50 × 5 =
  15. 15.14 × 50 =
  16. 16.61 × 5 =
  17. 17.88 × 5 =
  18. 18.46 × 5 =
  19. 19.81 × 50 =
  20. 20.64 × 50 =
  21. 21.68 × 5 =
  22. 22.76 × 50 =
  23. 23.69 × 50 =
  24. 24.30 × 5 =
  25. 25.98 × 50 =
  26. 26.70 × 5 =
  27. 27.78 × 5 =
  28. 28.32 × 50 =
  29. 29.26 × 5 =
  30. 30.49 × 5 =
  31. 31.71 × 50 =
  32. 32.35 × 50 =
  33. 33.20 × 50 =
  34. 34.19 × 5 =
  35. 35.94 × 50 =
  36. 36.17 × 50 =
  37. 37.18 × 5 =
  38. 38.97 × 5 =
  39. 39.28 × 5 =
  40. 40.86 × 50 =

Answer key

  1. 2300
  2. 800
  3. 260
  4. 465
  5. 105
  6. 3000
  7. 2650
  8. 60
  9. 320
  10. 1300
  11. 85
  12. 185
  13. 4500
  14. 250
  15. 700
  16. 305
  17. 440
  18. 230
  19. 4050
  20. 3200
  21. 340
  22. 3800
  23. 3450
  24. 150
  25. 4900
  26. 350
  27. 390
  28. 1600
  29. 130
  30. 245
  31. 3550
  32. 1750
  33. 1000
  34. 95
  35. 4700
  36. 850
  37. 90
  38. 485
  39. 140
  40. 4300

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