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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 520 · 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. 1.66 × 5 =
  2. 2.53 × 5 =
  3. 3.72 × 5 =
  4. 4.45 × 5 =
  5. 5.18 × 50 =
  6. 6.82 × 50 =
  7. 7.20 × 50 =
  8. 8.76 × 5 =
  9. 9.18 × 5 =
  10. 10.33 × 50 =
  11. 11.14 × 5 =
  12. 12.94 × 5 =
  13. 13.23 × 5 =
  14. 14.58 × 50 =
  15. 15.57 × 50 =
  16. 16.46 × 5 =
  17. 17.97 × 5 =
  18. 18.97 × 50 =
  19. 19.15 × 50 =
  20. 20.33 × 50 =
  21. 21.18 × 50 =
  22. 22.62 × 50 =
  23. 23.39 × 5 =
  24. 24.18 × 50 =
  25. 25.52 × 50 =
  26. 26.94 × 5 =
  27. 27.88 × 5 =
  28. 28.36 × 50 =
  29. 29.61 × 5 =
  30. 30.43 × 5 =
  31. 31.26 × 50 =
  32. 32.24 × 5 =
  33. 33.74 × 5 =
  34. 34.81 × 50 =
  35. 35.69 × 5 =
  36. 36.77 × 50 =
  37. 37.28 × 5 =
  38. 38.26 × 5 =
  39. 39.31 × 5 =
  40. 40.54 × 50 =

Answer key

  1. 330
  2. 265
  3. 360
  4. 225
  5. 900
  6. 4100
  7. 1000
  8. 380
  9. 90
  10. 1650
  11. 70
  12. 470
  13. 115
  14. 2900
  15. 2850
  16. 230
  17. 485
  18. 4850
  19. 750
  20. 1650
  21. 900
  22. 3100
  23. 195
  24. 900
  25. 2600
  26. 470
  27. 440
  28. 1800
  29. 305
  30. 215
  31. 1300
  32. 120
  33. 370
  34. 4050
  35. 345
  36. 3850
  37. 140
  38. 130
  39. 155
  40. 2700

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