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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 620 · 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. 1.83 × 5 =
  2. 2.16 × 50 =
  3. 3.69 × 5 =
  4. 4.35 × 50 =
  5. 5.26 × 5 =
  6. 6.14 × 50 =
  7. 7.37 × 50 =
  8. 8.39 × 5 =
  9. 9.88 × 50 =
  10. 10.54 × 5 =
  11. 11.69 × 5 =
  12. 12.40 × 50 =
  13. 13.65 × 5 =
  14. 14.51 × 50 =
  15. 15.15 × 5 =
  16. 16.69 × 50 =
  17. 17.37 × 5 =
  18. 18.55 × 50 =
  19. 19.97 × 5 =
  20. 20.92 × 5 =
  21. 21.64 × 50 =
  22. 22.36 × 5 =
  23. 23.54 × 50 =
  24. 24.49 × 5 =
  25. 25.61 × 50 =
  26. 26.22 × 50 =
  27. 27.95 × 50 =
  28. 28.39 × 5 =
  29. 29.38 × 50 =
  30. 30.97 × 5 =
  31. 31.42 × 5 =
  32. 32.48 × 5 =
  33. 33.38 × 5 =
  34. 34.68 × 5 =
  35. 35.91 × 50 =
  36. 36.68 × 5 =
  37. 37.82 × 50 =
  38. 38.30 × 5 =
  39. 39.41 × 50 =
  40. 40.52 × 5 =

Answer key

  1. 415
  2. 800
  3. 345
  4. 1750
  5. 130
  6. 700
  7. 1850
  8. 195
  9. 4400
  10. 270
  11. 345
  12. 2000
  13. 325
  14. 2550
  15. 75
  16. 3450
  17. 185
  18. 2750
  19. 485
  20. 460
  21. 3200
  22. 180
  23. 2700
  24. 245
  25. 3050
  26. 1100
  27. 4750
  28. 195
  29. 1900
  30. 485
  31. 210
  32. 240
  33. 190
  34. 340
  35. 4550
  36. 340
  37. 4100
  38. 150
  39. 2050
  40. 260

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