Sagot :

Bonjour,
11/2 - 4 = 11/2-8/2 = 3/2

10/11-(2-3/4)+13/22 = 10/11-2+3/4+13/22 = 20/22 -44/22+3/4+13/22= -11/22 + 3/4= -22/44 + 33/44 = 11/44= 1/4