Elimine os parenteses e faça os calculos necessarios :
A = ( - 20 ) + ( - 1 ) + ( + 21 ) + ( + 23 ) + ( - 4 ) + ( - 100 ) =
B = ( + 53 ) + ( + 63 ) + ( - 80 ) + ( + 37 ) + ( - 21 ) =
A = ( - 20 ) + ( - 1 ) + ( + 21 ) + ( + 23 ) + ( - 4 ) + ( - 100 ) =
B = ( + 53 ) + ( + 63 ) + ( - 80 ) + ( + 37 ) + ( - 21 ) =
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- 21 + 44 - 104 =
23 - 104 = - 81
b = 53 + 63 - 80 + 37 - 21 =
116 - 43 - 21 =
73 - 21 = 52
a = ( - 20 ) + ( - 1 ) + ( + 21 ) + ( + 23 ) + ( - 4 ) + ( - 100 ) =
-20-1+21+23-4-100=
-21+44-104=
+23-104=-81
b = ( + 53 ) + ( + 63 ) + ( - 80 ) + ( + 37 ) + ( - 21 ) =
+53+63-80+37-21=
116-43-21=
116-64=52