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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 71 · 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. 1.43 × 50 =
  2. 2.54 × 5 =
  3. 3.65 × 50 =
  4. 4.35 × 5 =
  5. 5.19 × 5 =
  6. 6.25 × 5 =
  7. 7.57 × 50 =
  8. 8.81 × 50 =
  9. 9.51 × 5 =
  10. 10.68 × 5 =
  11. 11.18 × 50 =
  12. 12.12 × 5 =
  13. 13.40 × 5 =
  14. 14.84 × 50 =
  15. 15.51 × 5 =
  16. 16.19 × 50 =
  17. 17.51 × 5 =
  18. 18.93 × 50 =
  19. 19.25 × 50 =
  20. 20.67 × 5 =
  21. 21.24 × 50 =
  22. 22.76 × 5 =
  23. 23.36 × 5 =
  24. 24.76 × 5 =
  25. 25.14 × 5 =
  26. 26.49 × 50 =
  27. 27.33 × 50 =
  28. 28.48 × 50 =
  29. 29.35 × 50 =
  30. 30.94 × 50 =
  31. 31.29 × 5 =
  32. 32.32 × 5 =
  33. 33.15 × 50 =
  34. 34.87 × 50 =
  35. 35.65 × 50 =
  36. 36.89 × 50 =
  37. 37.76 × 50 =
  38. 38.71 × 5 =
  39. 39.19 × 50 =
  40. 40.69 × 5 =

Answer key

  1. 2150
  2. 270
  3. 3250
  4. 175
  5. 95
  6. 125
  7. 2850
  8. 4050
  9. 255
  10. 340
  11. 900
  12. 60
  13. 200
  14. 4200
  15. 255
  16. 950
  17. 255
  18. 4650
  19. 1250
  20. 335
  21. 1200
  22. 380
  23. 180
  24. 380
  25. 70
  26. 2450
  27. 1650
  28. 2400
  29. 1750
  30. 4700
  31. 145
  32. 160
  33. 750
  34. 4350
  35. 3250
  36. 4450
  37. 3800
  38. 355
  39. 950
  40. 345

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