Помогите решить: 1) 8 1\2 + (-4 5\7) + (-3 2\7)=
8 1/2 + (-4 5/7) + (-3 2/7) = 17/2 - 33/7 - 23/7 = 119/14-66/14-46/14 = = 7/14 = 1/2