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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 803 · 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. 1.95 × 5 =
  2. 2.17 × 5 =
  3. 3.33 × 50 =
  4. 4.83 × 5 =
  5. 5.38 × 5 =
  6. 6.61 × 5 =
  7. 7.24 × 5 =
  8. 8.43 × 50 =
  9. 9.24 × 5 =
  10. 10.68 × 5 =
  11. 11.65 × 5 =
  12. 12.63 × 50 =
  13. 13.71 × 5 =
  14. 14.61 × 50 =
  15. 15.32 × 5 =
  16. 16.60 × 5 =
  17. 17.86 × 50 =
  18. 18.84 × 5 =
  19. 19.83 × 50 =
  20. 20.13 × 5 =
  21. 21.12 × 5 =
  22. 22.14 × 5 =
  23. 23.71 × 50 =
  24. 24.17 × 50 =
  25. 25.25 × 50 =
  26. 26.81 × 5 =
  27. 27.43 × 50 =
  28. 28.69 × 5 =
  29. 29.80 × 50 =
  30. 30.90 × 50 =
  31. 31.19 × 5 =
  32. 32.70 × 50 =
  33. 33.28 × 50 =
  34. 34.45 × 5 =
  35. 35.33 × 5 =
  36. 36.39 × 5 =
  37. 37.73 × 50 =
  38. 38.21 × 50 =
  39. 39.15 × 5 =
  40. 40.37 × 5 =

Answer key

  1. 475
  2. 85
  3. 1650
  4. 415
  5. 190
  6. 305
  7. 120
  8. 2150
  9. 120
  10. 340
  11. 325
  12. 3150
  13. 355
  14. 3050
  15. 160
  16. 300
  17. 4300
  18. 420
  19. 4150
  20. 65
  21. 60
  22. 70
  23. 3550
  24. 850
  25. 1250
  26. 405
  27. 2150
  28. 345
  29. 4000
  30. 4500
  31. 95
  32. 3500
  33. 1400
  34. 225
  35. 165
  36. 195
  37. 3650
  38. 1050
  39. 75
  40. 185

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