Question

Calcule as expressoes

a) 10-[5-(2-)+(1)]=

b) 2-[3+[4-(1-2)+3]-4)=

Answer 1

a) 10-[5-(2-)+(1)]=

10-[5-2-1]=

10-[5-3]=

10-2=

8


b) 2-[3+[4-(1-2)+3]-4)=

2-[3+[4-(-1)+3]-4)=

2-[3+[4+1+3]-4)=

2-[3+8-4)=

2-[3+4)=

2-7=

-5