А) 13,2+(-12)+0,5+(-2)+(-4)=13,2-12+0,5-2-4=13,7-18=-4,3. б)-8+4+(-0,2)+0,6=-8+4-0,2+0,6=-8,2+4,6=-3,6. в)-3,9+(-0,1)+(-4,7)+9+(-6,7)=-3,9-0,1-4,7+9-6,7=9-15,4=-6,4. г)-1 5/8+(-1/4)+1/4+3/8=-1 5/8-1/4+1/4+3/8=-1 2/8=-1 1/4. д) -3 1/4+1 1/4+(-7 3/4)+9=-3 1/4+1 1/4-7 3/4+9=-9 3/4+9=-3/4. е)-1/4+(-(-8 7/9))=-1/4-(-8 7/9)=-1/4+8 7/9=(-9+316)/36=-307/36=-8 19/36