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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 753 · 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. 1.69 × 50 =
  2. 2.92 × 50 =
  3. 3.82 × 50 =
  4. 4.66 × 5 =
  5. 5.96 × 50 =
  6. 6.40 × 5 =
  7. 7.30 × 5 =
  8. 8.17 × 50 =
  9. 9.50 × 5 =
  10. 10.75 × 5 =
  11. 11.26 × 5 =
  12. 12.88 × 5 =
  13. 13.43 × 5 =
  14. 14.73 × 5 =
  15. 15.71 × 5 =
  16. 16.74 × 5 =
  17. 17.50 × 50 =
  18. 18.19 × 50 =
  19. 19.91 × 5 =
  20. 20.87 × 50 =
  21. 21.81 × 5 =
  22. 22.81 × 50 =
  23. 23.22 × 5 =
  24. 24.25 × 5 =
  25. 25.36 × 50 =
  26. 26.81 × 5 =
  27. 27.12 × 50 =
  28. 28.69 × 5 =
  29. 29.82 × 5 =
  30. 30.77 × 50 =
  31. 31.73 × 50 =
  32. 32.28 × 5 =
  33. 33.95 × 5 =
  34. 34.91 × 50 =
  35. 35.21 × 50 =
  36. 36.98 × 5 =
  37. 37.84 × 50 =
  38. 38.31 × 5 =
  39. 39.67 × 5 =
  40. 40.24 × 50 =

Answer key

  1. 3450
  2. 4600
  3. 4100
  4. 330
  5. 4800
  6. 200
  7. 150
  8. 850
  9. 250
  10. 375
  11. 130
  12. 440
  13. 215
  14. 365
  15. 355
  16. 370
  17. 2500
  18. 950
  19. 455
  20. 4350
  21. 405
  22. 4050
  23. 110
  24. 125
  25. 1800
  26. 405
  27. 600
  28. 345
  29. 410
  30. 3850
  31. 3650
  32. 140
  33. 475
  34. 4550
  35. 1050
  36. 490
  37. 4200
  38. 155
  39. 335
  40. 1200

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