Question

a) -11{+2+[-3-(-1+7)]+2}

b) 10-{-2+[+1+(+7-3)-2]+6}

c)-{-2-[-3-(-5)+1]}-18

Answer 1

A) -11{+2+[-3-(-1+7)]+2}
-11{+2+[-3-6]+2}
-11{+2-9+2}
-11{7+2}
-11+9
2
B) 10-{-2+[+1+(+7-3)-2]+6}
10-{-2+[+1+4-2]+6}
10-{-2+3+6}
10-7
3
C)-{-2-[-3-(-5)+1]}-18
-{-2-[-3+5+1]}-18
-{-2-3}-18
-5-18
23
Espero ter ajudado