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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 120 · 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. 1.93 × 5 =
  2. 2.23 × 5 =
  3. 3.36 × 5 =
  4. 4.32 × 50 =
  5. 5.25 × 50 =
  6. 6.28 × 5 =
  7. 7.30 × 5 =
  8. 8.60 × 5 =
  9. 9.16 × 5 =
  10. 10.96 × 50 =
  11. 11.79 × 50 =
  12. 12.91 × 5 =
  13. 13.69 × 5 =
  14. 14.89 × 50 =
  15. 15.35 × 50 =
  16. 16.47 × 50 =
  17. 17.44 × 5 =
  18. 18.28 × 5 =
  19. 19.36 × 5 =
  20. 20.70 × 50 =
  21. 21.84 × 5 =
  22. 22.17 × 50 =
  23. 23.48 × 5 =
  24. 24.57 × 50 =
  25. 25.96 × 5 =
  26. 26.86 × 5 =
  27. 27.58 × 50 =
  28. 28.38 × 5 =
  29. 29.50 × 5 =
  30. 30.82 × 5 =
  31. 31.15 × 5 =
  32. 32.86 × 5 =
  33. 33.69 × 5 =
  34. 34.59 × 5 =
  35. 35.48 × 5 =
  36. 36.75 × 50 =
  37. 37.58 × 5 =
  38. 38.36 × 5 =
  39. 39.69 × 5 =
  40. 40.35 × 5 =

Answer key

  1. 465
  2. 115
  3. 180
  4. 1600
  5. 1250
  6. 140
  7. 150
  8. 300
  9. 80
  10. 4800
  11. 3950
  12. 455
  13. 345
  14. 4450
  15. 1750
  16. 2350
  17. 220
  18. 140
  19. 180
  20. 3500
  21. 420
  22. 850
  23. 240
  24. 2850
  25. 480
  26. 430
  27. 2900
  28. 190
  29. 250
  30. 410
  31. 75
  32. 430
  33. 345
  34. 295
  35. 240
  36. 3750
  37. 290
  38. 180
  39. 345
  40. 175

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