A.1.3+2.5=3.8,
B.128,15+38,85=+166,00
C.4.21+(-196)=4.21-19.00=-191.79
D.-0.7=9-0.3)=-0.7-0.3=-10
E.-13.5+(-279.42)=-13.5-279.42=-292.92
F.-7.6+4=-3.6
G.-1.(3)+0=-1.(3)
H.1.(3)+(6)=1.33+0.66=1.99
I.2.5+3.(5)=2.5+3.55=6.05
M.1.4+(-3.15)+1.6=1.4-3.15+1.6=-1.75+1.6=-0.15