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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 338 · 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. 1.70 × 5 =
  2. 2.52 × 50 =
  3. 3.53 × 5 =
  4. 4.20 × 50 =
  5. 5.46 × 5 =
  6. 6.42 × 50 =
  7. 7.38 × 50 =
  8. 8.38 × 50 =
  9. 9.91 × 50 =
  10. 10.83 × 50 =
  11. 11.66 × 50 =
  12. 12.26 × 50 =
  13. 13.52 × 50 =
  14. 14.43 × 5 =
  15. 15.34 × 5 =
  16. 16.28 × 5 =
  17. 17.41 × 50 =
  18. 18.47 × 50 =
  19. 19.31 × 5 =
  20. 20.44 × 5 =
  21. 21.58 × 50 =
  22. 22.50 × 5 =
  23. 23.67 × 50 =
  24. 24.22 × 50 =
  25. 25.73 × 5 =
  26. 26.42 × 5 =
  27. 27.57 × 50 =
  28. 28.85 × 5 =
  29. 29.39 × 5 =
  30. 30.34 × 5 =
  31. 31.81 × 5 =
  32. 32.64 × 5 =
  33. 33.71 × 50 =
  34. 34.56 × 5 =
  35. 35.64 × 5 =
  36. 36.85 × 5 =
  37. 37.81 × 5 =
  38. 38.13 × 50 =
  39. 39.32 × 5 =
  40. 40.91 × 5 =

Answer key

  1. 350
  2. 2600
  3. 265
  4. 1000
  5. 230
  6. 2100
  7. 1900
  8. 1900
  9. 4550
  10. 4150
  11. 3300
  12. 1300
  13. 2600
  14. 215
  15. 170
  16. 140
  17. 2050
  18. 2350
  19. 155
  20. 220
  21. 2900
  22. 250
  23. 3350
  24. 1100
  25. 365
  26. 210
  27. 2850
  28. 425
  29. 195
  30. 170
  31. 405
  32. 320
  33. 3550
  34. 280
  35. 320
  36. 425
  37. 405
  38. 650
  39. 160
  40. 455

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