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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 631 · 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 × 50 =
  2. 2.78 × 50 =
  3. 3.76 × 50 =
  4. 4.19 × 50 =
  5. 5.81 × 5 =
  6. 6.35 × 50 =
  7. 7.82 × 5 =
  8. 8.42 × 50 =
  9. 9.97 × 5 =
  10. 10.97 × 5 =
  11. 11.25 × 50 =
  12. 12.34 × 50 =
  13. 13.55 × 50 =
  14. 14.20 × 5 =
  15. 15.40 × 50 =
  16. 16.93 × 5 =
  17. 17.47 × 50 =
  18. 18.40 × 50 =
  19. 19.72 × 50 =
  20. 20.22 × 50 =
  21. 21.92 × 5 =
  22. 22.74 × 5 =
  23. 23.41 × 50 =
  24. 24.35 × 50 =
  25. 25.90 × 50 =
  26. 26.65 × 5 =
  27. 27.34 × 5 =
  28. 28.18 × 5 =
  29. 29.43 × 50 =
  30. 30.42 × 50 =
  31. 31.45 × 5 =
  32. 32.34 × 5 =
  33. 33.72 × 5 =
  34. 34.32 × 50 =
  35. 35.81 × 5 =
  36. 36.88 × 5 =
  37. 37.41 × 5 =
  38. 38.87 × 5 =
  39. 39.95 × 5 =
  40. 40.40 × 5 =

Answer key

  1. 2300
  2. 3900
  3. 3800
  4. 950
  5. 405
  6. 1750
  7. 410
  8. 2100
  9. 485
  10. 485
  11. 1250
  12. 1700
  13. 2750
  14. 100
  15. 2000
  16. 465
  17. 2350
  18. 2000
  19. 3600
  20. 1100
  21. 460
  22. 370
  23. 2050
  24. 1750
  25. 4500
  26. 325
  27. 170
  28. 90
  29. 2150
  30. 2100
  31. 225
  32. 170
  33. 360
  34. 1600
  35. 405
  36. 440
  37. 205
  38. 435
  39. 475
  40. 200

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