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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 67 · 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. 1.23 × 50 =
  2. 2.33 × 5 =
  3. 3.31 × 50 =
  4. 4.66 × 5 =
  5. 5.50 × 50 =
  6. 6.49 × 50 =
  7. 7.18 × 50 =
  8. 8.32 × 50 =
  9. 9.30 × 5 =
  10. 10.20 × 50 =
  11. 11.15 × 50 =
  12. 12.25 × 50 =
  13. 13.72 × 50 =
  14. 14.53 × 5 =
  15. 15.79 × 50 =
  16. 16.52 × 50 =
  17. 17.26 × 50 =
  18. 18.89 × 5 =
  19. 19.34 × 5 =
  20. 20.19 × 50 =
  21. 21.54 × 5 =
  22. 22.28 × 5 =
  23. 23.66 × 5 =
  24. 24.39 × 5 =
  25. 25.47 × 5 =
  26. 26.27 × 5 =
  27. 27.61 × 50 =
  28. 28.88 × 5 =
  29. 29.16 × 50 =
  30. 30.35 × 50 =
  31. 31.22 × 5 =
  32. 32.66 × 50 =
  33. 33.97 × 5 =
  34. 34.81 × 5 =
  35. 35.43 × 5 =
  36. 36.25 × 50 =
  37. 37.84 × 50 =
  38. 38.51 × 5 =
  39. 39.42 × 5 =
  40. 40.13 × 5 =

Answer key

  1. 1150
  2. 165
  3. 1550
  4. 330
  5. 2500
  6. 2450
  7. 900
  8. 1600
  9. 150
  10. 1000
  11. 750
  12. 1250
  13. 3600
  14. 265
  15. 3950
  16. 2600
  17. 1300
  18. 445
  19. 170
  20. 950
  21. 270
  22. 140
  23. 330
  24. 195
  25. 235
  26. 135
  27. 3050
  28. 440
  29. 800
  30. 1750
  31. 110
  32. 3300
  33. 485
  34. 405
  35. 215
  36. 1250
  37. 4200
  38. 255
  39. 210
  40. 65

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