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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 424 · 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. 1.94 × 5 =
  2. 2.48 × 50 =
  3. 3.97 × 5 =
  4. 4.15 × 50 =
  5. 5.31 × 50 =
  6. 6.20 × 5 =
  7. 7.90 × 50 =
  8. 8.67 × 50 =
  9. 9.46 × 5 =
  10. 10.73 × 5 =
  11. 11.61 × 5 =
  12. 12.44 × 5 =
  13. 13.39 × 5 =
  14. 14.29 × 5 =
  15. 15.56 × 5 =
  16. 16.59 × 5 =
  17. 17.20 × 50 =
  18. 18.31 × 50 =
  19. 19.50 × 5 =
  20. 20.63 × 5 =
  21. 21.15 × 5 =
  22. 22.72 × 5 =
  23. 23.27 × 5 =
  24. 24.83 × 5 =
  25. 25.32 × 50 =
  26. 26.30 × 50 =
  27. 27.32 × 5 =
  28. 28.61 × 5 =
  29. 29.34 × 5 =
  30. 30.49 × 50 =
  31. 31.22 × 5 =
  32. 32.54 × 50 =
  33. 33.35 × 50 =
  34. 34.59 × 5 =
  35. 35.32 × 5 =
  36. 36.72 × 50 =
  37. 37.31 × 5 =
  38. 38.71 × 5 =
  39. 39.88 × 50 =
  40. 40.36 × 5 =

Answer key

  1. 470
  2. 2400
  3. 485
  4. 750
  5. 1550
  6. 100
  7. 4500
  8. 3350
  9. 230
  10. 365
  11. 305
  12. 220
  13. 195
  14. 145
  15. 280
  16. 295
  17. 1000
  18. 1550
  19. 250
  20. 315
  21. 75
  22. 360
  23. 135
  24. 415
  25. 1600
  26. 1500
  27. 160
  28. 305
  29. 170
  30. 2450
  31. 110
  32. 2700
  33. 1750
  34. 295
  35. 160
  36. 3600
  37. 155
  38. 355
  39. 4400
  40. 180

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