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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 129 · 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. 1.38 × 50 =
  2. 2.62 × 5 =
  3. 3.74 × 5 =
  4. 4.68 × 5 =
  5. 5.43 × 50 =
  6. 6.35 × 50 =
  7. 7.33 × 5 =
  8. 8.45 × 5 =
  9. 9.16 × 50 =
  10. 10.84 × 50 =
  11. 11.36 × 50 =
  12. 12.95 × 50 =
  13. 13.98 × 5 =
  14. 14.32 × 50 =
  15. 15.29 × 5 =
  16. 16.28 × 50 =
  17. 17.39 × 50 =
  18. 18.70 × 5 =
  19. 19.78 × 50 =
  20. 20.96 × 5 =
  21. 21.55 × 50 =
  22. 22.61 × 50 =
  23. 23.88 × 5 =
  24. 24.36 × 5 =
  25. 25.93 × 50 =
  26. 26.93 × 5 =
  27. 27.57 × 5 =
  28. 28.46 × 50 =
  29. 29.46 × 50 =
  30. 30.18 × 50 =
  31. 31.66 × 5 =
  32. 32.32 × 5 =
  33. 33.54 × 5 =
  34. 34.13 × 50 =
  35. 35.91 × 50 =
  36. 36.15 × 50 =
  37. 37.84 × 5 =
  38. 38.38 × 5 =
  39. 39.12 × 5 =
  40. 40.17 × 50 =

Answer key

  1. 1900
  2. 310
  3. 370
  4. 340
  5. 2150
  6. 1750
  7. 165
  8. 225
  9. 800
  10. 4200
  11. 1800
  12. 4750
  13. 490
  14. 1600
  15. 145
  16. 1400
  17. 1950
  18. 350
  19. 3900
  20. 480
  21. 2750
  22. 3050
  23. 440
  24. 180
  25. 4650
  26. 465
  27. 285
  28. 2300
  29. 2300
  30. 900
  31. 330
  32. 160
  33. 270
  34. 650
  35. 4550
  36. 750
  37. 420
  38. 190
  39. 60
  40. 850

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