Question

Me ajudemmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm nessas duas questoes calculo pf

Answer 1

a) (19.13)+ [19.(-13)
247+ (-247)
r=0
b) [35+(-17)] + [(-25)+65]+100
18+ 40+100
r=158