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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 323 · 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. 1.90 × 5 =
  2. 2.32 × 50 =
  3. 3.29 × 50 =
  4. 4.87 × 5 =
  5. 5.45 × 5 =
  6. 6.38 × 5 =
  7. 7.45 × 50 =
  8. 8.93 × 5 =
  9. 9.73 × 5 =
  10. 10.81 × 50 =
  11. 11.71 × 5 =
  12. 12.74 × 5 =
  13. 13.83 × 50 =
  14. 14.88 × 5 =
  15. 15.63 × 5 =
  16. 16.16 × 50 =
  17. 17.14 × 50 =
  18. 18.73 × 5 =
  19. 19.18 × 5 =
  20. 20.81 × 50 =
  21. 21.31 × 50 =
  22. 22.85 × 50 =
  23. 23.83 × 5 =
  24. 24.77 × 5 =
  25. 25.70 × 50 =
  26. 26.75 × 5 =
  27. 27.58 × 5 =
  28. 28.65 × 5 =
  29. 29.19 × 5 =
  30. 30.15 × 50 =
  31. 31.95 × 5 =
  32. 32.32 × 50 =
  33. 33.23 × 50 =
  34. 34.42 × 5 =
  35. 35.24 × 5 =
  36. 36.43 × 5 =
  37. 37.18 × 50 =
  38. 38.58 × 5 =
  39. 39.66 × 50 =
  40. 40.83 × 50 =

Answer key

  1. 450
  2. 1600
  3. 1450
  4. 435
  5. 225
  6. 190
  7. 2250
  8. 465
  9. 365
  10. 4050
  11. 355
  12. 370
  13. 4150
  14. 440
  15. 315
  16. 800
  17. 700
  18. 365
  19. 90
  20. 4050
  21. 1550
  22. 4250
  23. 415
  24. 385
  25. 3500
  26. 375
  27. 290
  28. 325
  29. 95
  30. 750
  31. 475
  32. 1600
  33. 1150
  34. 210
  35. 120
  36. 215
  37. 900
  38. 290
  39. 3300
  40. 4150

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