А)-2/)= б)148-154= в)9 5/6 - 3 2/9= г) 7/12 /15)= д)-54.7-42.7= у)-3 5/6 - 10 3/8= решите

а)-2/7-(-3)=-2/7 + 3 = 3 - 2/7 = 2  2/7;
б)148-154= - 6;
в)9 5/6 - 3 2/9= 9 15/18 - 3 6/18 = 6  9/18 = 6  1/2;
г) 7/12 -(-8/15)= 35/60 + 32/60 = 67/60 = 1  7/60;
д)-54.7-42.7= - 97,4
у)-3 5/6 - 10 3/8= - 3 20/24 - 10  9/24 = -13  29/24 = 14  5/24.