Question

calcule as expressões (-15+4)+[-18+(-3-7+5)] ,-1+[1+(1-1)-11 e -1+(-2+5)+[-4+(-6+5-8)]

Answer 1

(-15+4)+[-18+(-3-7+5)]
-11+[-18+(-5)]=
-11-23
-34

1+[1+(1-1)-11
-1+[1+(0)-11]
-1+(-10)
-11


-1+(-2+5)+[-4+(-6+5-8)]
-1+(3)+[-4+(-9)]
2+[-13]
-11