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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 348 · 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. 1.28 × 5 =
  2. 2.15 × 50 =
  3. 3.80 × 5 =
  4. 4.54 × 5 =
  5. 5.70 × 50 =
  6. 6.49 × 50 =
  7. 7.57 × 5 =
  8. 8.66 × 50 =
  9. 9.91 × 5 =
  10. 10.35 × 5 =
  11. 11.25 × 5 =
  12. 12.92 × 50 =
  13. 13.32 × 50 =
  14. 14.54 × 5 =
  15. 15.29 × 5 =
  16. 16.36 × 50 =
  17. 17.56 × 50 =
  18. 18.58 × 50 =
  19. 19.16 × 5 =
  20. 20.26 × 50 =
  21. 21.84 × 5 =
  22. 22.70 × 5 =
  23. 23.28 × 5 =
  24. 24.77 × 5 =
  25. 25.74 × 50 =
  26. 26.39 × 5 =
  27. 27.87 × 5 =
  28. 28.64 × 50 =
  29. 29.69 × 5 =
  30. 30.19 × 50 =
  31. 31.31 × 50 =
  32. 32.39 × 5 =
  33. 33.52 × 5 =
  34. 34.97 × 5 =
  35. 35.85 × 5 =
  36. 36.16 × 50 =
  37. 37.92 × 50 =
  38. 38.57 × 5 =
  39. 39.33 × 5 =
  40. 40.66 × 50 =

Answer key

  1. 140
  2. 750
  3. 400
  4. 270
  5. 3500
  6. 2450
  7. 285
  8. 3300
  9. 455
  10. 175
  11. 125
  12. 4600
  13. 1600
  14. 270
  15. 145
  16. 1800
  17. 2800
  18. 2900
  19. 80
  20. 1300
  21. 420
  22. 350
  23. 140
  24. 385
  25. 3700
  26. 195
  27. 435
  28. 3200
  29. 345
  30. 950
  31. 1550
  32. 195
  33. 260
  34. 485
  35. 425
  36. 800
  37. 4600
  38. 285
  39. 165
  40. 3300

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