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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 674 · 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. 1.89 × 5 =
  2. 2.66 × 5 =
  3. 3.61 × 50 =
  4. 4.90 × 5 =
  5. 5.44 × 5 =
  6. 6.48 × 50 =
  7. 7.34 × 50 =
  8. 8.62 × 5 =
  9. 9.39 × 5 =
  10. 10.59 × 5 =
  11. 11.89 × 5 =
  12. 12.89 × 5 =
  13. 13.81 × 5 =
  14. 14.90 × 5 =
  15. 15.22 × 5 =
  16. 16.23 × 5 =
  17. 17.22 × 50 =
  18. 18.32 × 5 =
  19. 19.28 × 5 =
  20. 20.69 × 5 =
  21. 21.35 × 50 =
  22. 22.19 × 50 =
  23. 23.58 × 5 =
  24. 24.37 × 50 =
  25. 25.30 × 50 =
  26. 26.38 × 5 =
  27. 27.96 × 5 =
  28. 28.88 × 50 =
  29. 29.29 × 5 =
  30. 30.75 × 50 =
  31. 31.69 × 5 =
  32. 32.20 × 5 =
  33. 33.14 × 50 =
  34. 34.83 × 5 =
  35. 35.83 × 50 =
  36. 36.20 × 50 =
  37. 37.48 × 50 =
  38. 38.97 × 5 =
  39. 39.87 × 5 =
  40. 40.16 × 50 =

Answer key

  1. 445
  2. 330
  3. 3050
  4. 450
  5. 220
  6. 2400
  7. 1700
  8. 310
  9. 195
  10. 295
  11. 445
  12. 445
  13. 405
  14. 450
  15. 110
  16. 115
  17. 1100
  18. 160
  19. 140
  20. 345
  21. 1750
  22. 950
  23. 290
  24. 1850
  25. 1500
  26. 190
  27. 480
  28. 4400
  29. 145
  30. 3750
  31. 345
  32. 100
  33. 700
  34. 415
  35. 4150
  36. 1000
  37. 2400
  38. 485
  39. 435
  40. 800

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