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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 31 · 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. 1.61 × 50 =
  2. 2.61 × 50 =
  3. 3.73 × 50 =
  4. 4.64 × 5 =
  5. 5.25 × 50 =
  6. 6.19 × 50 =
  7. 7.91 × 5 =
  8. 8.41 × 50 =
  9. 9.46 × 5 =
  10. 10.54 × 5 =
  11. 11.32 × 50 =
  12. 12.68 × 5 =
  13. 13.86 × 5 =
  14. 14.15 × 50 =
  15. 15.12 × 5 =
  16. 16.82 × 50 =
  17. 17.66 × 50 =
  18. 18.47 × 50 =
  19. 19.31 × 5 =
  20. 20.56 × 5 =
  21. 21.42 × 5 =
  22. 22.86 × 5 =
  23. 23.76 × 5 =
  24. 24.39 × 5 =
  25. 25.53 × 5 =
  26. 26.70 × 50 =
  27. 27.96 × 50 =
  28. 28.27 × 50 =
  29. 29.38 × 5 =
  30. 30.36 × 5 =
  31. 31.81 × 50 =
  32. 32.25 × 50 =
  33. 33.58 × 5 =
  34. 34.38 × 5 =
  35. 35.51 × 5 =
  36. 36.42 × 5 =
  37. 37.12 × 5 =
  38. 38.77 × 50 =
  39. 39.17 × 50 =
  40. 40.83 × 5 =

Answer key

  1. 3050
  2. 3050
  3. 3650
  4. 320
  5. 1250
  6. 950
  7. 455
  8. 2050
  9. 230
  10. 270
  11. 1600
  12. 340
  13. 430
  14. 750
  15. 60
  16. 4100
  17. 3300
  18. 2350
  19. 155
  20. 280
  21. 210
  22. 430
  23. 380
  24. 195
  25. 265
  26. 3500
  27. 4800
  28. 1350
  29. 190
  30. 180
  31. 4050
  32. 1250
  33. 290
  34. 190
  35. 255
  36. 210
  37. 60
  38. 3850
  39. 850
  40. 415

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