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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 300 · 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. 2.21 × 5 =
  3. 3.41 × 5 =
  4. 4.45 × 50 =
  5. 5.46 × 5 =
  6. 6.48 × 50 =
  7. 7.26 × 5 =
  8. 8.36 × 5 =
  9. 9.40 × 50 =
  10. 10.64 × 50 =
  11. 11.53 × 5 =
  12. 12.17 × 50 =
  13. 13.94 × 5 =
  14. 14.90 × 5 =
  15. 15.80 × 5 =
  16. 16.55 × 50 =
  17. 17.45 × 50 =
  18. 18.81 × 5 =
  19. 19.71 × 50 =
  20. 20.61 × 5 =
  21. 21.32 × 5 =
  22. 22.37 × 50 =
  23. 23.43 × 5 =
  24. 24.73 × 5 =
  25. 25.17 × 5 =
  26. 26.46 × 5 =
  27. 27.23 × 50 =
  28. 28.37 × 5 =
  29. 29.62 × 50 =
  30. 30.86 × 50 =
  31. 31.31 × 5 =
  32. 32.33 × 5 =
  33. 33.18 × 5 =
  34. 34.91 × 5 =
  35. 35.31 × 5 =
  36. 36.91 × 50 =
  37. 37.49 × 5 =
  38. 38.26 × 50 =
  39. 39.18 × 50 =
  40. 40.64 × 5 =

Answer key

  1. 330
  2. 105
  3. 205
  4. 2250
  5. 230
  6. 2400
  7. 130
  8. 180
  9. 2000
  10. 3200
  11. 265
  12. 850
  13. 470
  14. 450
  15. 400
  16. 2750
  17. 2250
  18. 405
  19. 3550
  20. 305
  21. 160
  22. 1850
  23. 215
  24. 365
  25. 85
  26. 230
  27. 1150
  28. 185
  29. 3100
  30. 4300
  31. 155
  32. 165
  33. 90
  34. 455
  35. 155
  36. 4550
  37. 245
  38. 1300
  39. 900
  40. 320

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