Question

Suprimir paréntesis, corchetes y llaves y resolver

1) 5+4-(3+1)=
2) 4+ [10-(5-1)]=
3) (27+5)-(30-2)=
4) 78-{[4+(5-1)}-2=

Answer 1

1) 5+4-(3+1)=
5+4-3-1= 5

2) 4+ [10-(5-1)]=
4+(10-5+1)=
4+(6)=
4+6=10

3) (27+5)-(30-2)=
(32)-(28)=4

 4)78-{[4+(5-1)}-2=
78-(4+(4))-2=
78-(4+4)-2=
78-(8)-2=
78-8-2=68