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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 415 · 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 × 5 =
  2. 2.85 × 5 =
  3. 3.33 × 50 =
  4. 4.74 × 50 =
  5. 5.28 × 5 =
  6. 6.37 × 5 =
  7. 7.41 × 50 =
  8. 8.59 × 50 =
  9. 9.30 × 50 =
  10. 10.90 × 50 =
  11. 11.88 × 50 =
  12. 12.37 × 50 =
  13. 13.68 × 5 =
  14. 14.83 × 5 =
  15. 15.55 × 50 =
  16. 16.75 × 50 =
  17. 17.85 × 50 =
  18. 18.67 × 5 =
  19. 19.70 × 50 =
  20. 20.75 × 5 =
  21. 21.96 × 50 =
  22. 22.68 × 5 =
  23. 23.12 × 5 =
  24. 24.72 × 50 =
  25. 25.68 × 5 =
  26. 26.27 × 50 =
  27. 27.69 × 50 =
  28. 28.20 × 5 =
  29. 29.17 × 5 =
  30. 30.12 × 50 =
  31. 31.48 × 5 =
  32. 32.90 × 5 =
  33. 33.24 × 50 =
  34. 34.72 × 5 =
  35. 35.27 × 50 =
  36. 36.88 × 5 =
  37. 37.72 × 50 =
  38. 38.12 × 5 =
  39. 39.21 × 50 =
  40. 40.33 × 5 =

Answer key

  1. 230
  2. 425
  3. 1650
  4. 3700
  5. 140
  6. 185
  7. 2050
  8. 2950
  9. 1500
  10. 4500
  11. 4400
  12. 1850
  13. 340
  14. 415
  15. 2750
  16. 3750
  17. 4250
  18. 335
  19. 3500
  20. 375
  21. 4800
  22. 340
  23. 60
  24. 3600
  25. 340
  26. 1350
  27. 3450
  28. 100
  29. 85
  30. 600
  31. 240
  32. 450
  33. 1200
  34. 360
  35. 1350
  36. 440
  37. 3600
  38. 60
  39. 1050
  40. 165

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