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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 742 · 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. 1.56 × 50 =
  2. 2.20 × 50 =
  3. 3.35 × 5 =
  4. 4.90 × 5 =
  5. 5.74 × 5 =
  6. 6.97 × 50 =
  7. 7.71 × 50 =
  8. 8.18 × 50 =
  9. 9.19 × 50 =
  10. 10.67 × 50 =
  11. 11.21 × 5 =
  12. 12.75 × 50 =
  13. 13.36 × 50 =
  14. 14.32 × 5 =
  15. 15.56 × 5 =
  16. 16.79 × 5 =
  17. 17.15 × 50 =
  18. 18.26 × 5 =
  19. 19.31 × 5 =
  20. 20.82 × 5 =
  21. 21.73 × 50 =
  22. 22.25 × 5 =
  23. 23.81 × 5 =
  24. 24.29 × 50 =
  25. 25.64 × 5 =
  26. 26.47 × 5 =
  27. 27.91 × 5 =
  28. 28.57 × 5 =
  29. 29.90 × 50 =
  30. 30.29 × 5 =
  31. 31.39 × 5 =
  32. 32.78 × 50 =
  33. 33.48 × 5 =
  34. 34.12 × 50 =
  35. 35.22 × 50 =
  36. 36.78 × 5 =
  37. 37.72 × 50 =
  38. 38.14 × 50 =
  39. 39.19 × 50 =
  40. 40.34 × 50 =

Answer key

  1. 2800
  2. 1000
  3. 175
  4. 450
  5. 370
  6. 4850
  7. 3550
  8. 900
  9. 950
  10. 3350
  11. 105
  12. 3750
  13. 1800
  14. 160
  15. 280
  16. 395
  17. 750
  18. 130
  19. 155
  20. 410
  21. 3650
  22. 125
  23. 405
  24. 1450
  25. 320
  26. 235
  27. 455
  28. 285
  29. 4500
  30. 145
  31. 195
  32. 3900
  33. 240
  34. 600
  35. 1100
  36. 390
  37. 3600
  38. 700
  39. 950
  40. 1700

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