Question

Вычислите:
а)3/5+3/7+9/7*4/15=
б)(7/9-1/6):2/9*21/22=

Дам 20 баллов!

Answer 1

а)  = 21/35+15/35+36/105 = 36/35+12/35 = 48/35 = 1 13/35.
б) = (14/18-3/18):21/99 = (11/18):(7/33) = (11/18)*(33/7) = 363/126 = 121/42 = 2 37/42