Quick And Dirty Fractions Method

6,277 views
6,029 views

Published on

Just a few slides on a quick short cut to adding fractions. Used with science students who needed a revision session.

Published in: Education, Technology
2 Comments
0 Likes
Statistics
Notes
  • Great! Will show my students!
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Awesome!!!
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Be the first to like this

No Downloads
Views
Total views
6,277
On SlideShare
0
From Embeds
0
Number of Embeds
237
Actions
Shares
0
Downloads
99
Comments
2
Likes
0
Embeds 0
No embeds

No notes for slide

Quick And Dirty Fractions Method

  1. 1. You can add two fractions by doing three multiplications and an addition!
  2. 7. 3  3
  3. 8. 9
  4. 9. 9
  5. 10. 9 5  2
  6. 11. 9 10
  7. 12. 9 10
  8. 13. 9 10 5  3
  9. 14. 9 10 15
  10. 15. 9 10 15 +
  11. 16. 9 10 15 +
  12. 18. An example that has denominators with a common factor…
  13. 21. 5  9
  14. 22. 45
  15. 23. 45
  16. 24. 45 24
  17. 25. 45 24
  18. 26. 45 24 54
  19. 27. 45 24 54 +
  20. 28. 45 24 54 +
  21. 31. 5
  22. 32. 5 18
  23. 34. You had to cancel down at the end because of the common factor…
  24. 35. Mixed numbers?
  25. 36. Mixed numbers? Just convert to improper fractions and carry on…
  26. 37. Subtraction?
  27. 38. Subtraction? Just subtract the top totals instead of adding…
  28. 39. Your turn…
  29. 40. Answer on next slide…
  30. 42. Make up some more questions and check them with your calculator

×