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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 480 · 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. 1.72 × 5 =
  2. 2.80 × 50 =
  3. 3.38 × 50 =
  4. 4.50 × 50 =
  5. 5.57 × 50 =
  6. 6.40 × 5 =
  7. 7.94 × 5 =
  8. 8.79 × 50 =
  9. 9.82 × 5 =
  10. 10.22 × 5 =
  11. 11.18 × 5 =
  12. 12.17 × 50 =
  13. 13.19 × 50 =
  14. 14.48 × 5 =
  15. 15.14 × 5 =
  16. 16.15 × 5 =
  17. 17.68 × 5 =
  18. 18.56 × 5 =
  19. 19.48 × 50 =
  20. 20.42 × 5 =
  21. 21.91 × 5 =
  22. 22.20 × 50 =
  23. 23.22 × 50 =
  24. 24.64 × 5 =
  25. 25.97 × 5 =
  26. 26.43 × 5 =
  27. 27.69 × 50 =
  28. 28.56 × 5 =
  29. 29.92 × 5 =
  30. 30.67 × 50 =
  31. 31.12 × 5 =
  32. 32.25 × 50 =
  33. 33.48 × 5 =
  34. 34.74 × 50 =
  35. 35.65 × 50 =
  36. 36.73 × 5 =
  37. 37.24 × 5 =
  38. 38.66 × 50 =
  39. 39.31 × 5 =
  40. 40.62 × 50 =

Answer key

  1. 360
  2. 4000
  3. 1900
  4. 2500
  5. 2850
  6. 200
  7. 470
  8. 3950
  9. 410
  10. 110
  11. 90
  12. 850
  13. 950
  14. 240
  15. 70
  16. 75
  17. 340
  18. 280
  19. 2400
  20. 210
  21. 455
  22. 1000
  23. 1100
  24. 320
  25. 485
  26. 215
  27. 3450
  28. 280
  29. 460
  30. 3350
  31. 60
  32. 1250
  33. 240
  34. 3700
  35. 3250
  36. 365
  37. 120
  38. 3300
  39. 155
  40. 3100

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