А) -1,95 - (13,7-7,95)=-1,95-5,75 = -7,7
Б) -(-5,37+6,7) - (4,37+1,6) = -1,33 - 5,87 = -7,2
В) -(3 1/4+12 2/3)-(-6 3/4-2 1/6)= -(3 3/12+12 8/12)-(-6 9/12-2 2/12)=
-15 11/12 - (-8 11/12)= -15 11/12+8 11/12= -7
Г) 7 1/6- (-4,8+4 2/3)=7 1/6 - (-4 2/5+4 2/3)= 7 1/6 - (-4 6\15+4 10/15)=
7 1/6 - 4/15= 7 5/30 - 8/30=6 27/30=6,9