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Multiply by 5 and 50 Worksheet

Speed calculation lesson 7: × 5 and × 50: halve first · Set 799 · 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. 1.30 × 50 =
  2. 2.24 × 50 =
  3. 3.33 × 5 =
  4. 4.71 × 5 =
  5. 5.24 × 50 =
  6. 6.45 × 50 =
  7. 7.78 × 50 =
  8. 8.89 × 50 =
  9. 9.53 × 50 =
  10. 10.71 × 50 =
  11. 11.91 × 5 =
  12. 12.36 × 5 =
  13. 13.20 × 50 =
  14. 14.39 × 50 =
  15. 15.19 × 5 =
  16. 16.59 × 5 =
  17. 17.21 × 5 =
  18. 18.69 × 5 =
  19. 19.33 × 5 =
  20. 20.13 × 5 =
  21. 21.23 × 50 =
  22. 22.54 × 50 =
  23. 23.53 × 50 =
  24. 24.90 × 50 =
  25. 25.35 × 50 =
  26. 26.85 × 5 =
  27. 27.68 × 5 =
  28. 28.20 × 5 =
  29. 29.88 × 50 =
  30. 30.36 × 5 =
  31. 31.15 × 50 =
  32. 32.50 × 50 =
  33. 33.51 × 5 =
  34. 34.95 × 50 =
  35. 35.16 × 5 =
  36. 36.78 × 5 =
  37. 37.34 × 5 =
  38. 38.37 × 5 =
  39. 39.64 × 5 =
  40. 40.81 × 5 =

Answer key

  1. 1500
  2. 1200
  3. 165
  4. 355
  5. 1200
  6. 2250
  7. 3900
  8. 4450
  9. 2650
  10. 3550
  11. 455
  12. 180
  13. 1000
  14. 1950
  15. 95
  16. 295
  17. 105
  18. 345
  19. 165
  20. 65
  21. 1150
  22. 2700
  23. 2650
  24. 4500
  25. 1750
  26. 425
  27. 340
  28. 100
  29. 4400
  30. 180
  31. 750
  32. 2500
  33. 255
  34. 4750
  35. 80
  36. 390
  37. 170
  38. 185
  39. 320
  40. 405

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