6. 4/5 1/5 7. 11 7/7 5/7 8. + 4/15 1/3 = 9. - + 7/20 1/4 10. X 4/5 - 1/2 =​

6 45 15 7 11 77 57 8 415 13 9 720 14 10 X 45 12 class=