Question

12) Calcule:
a) ( )-(+21) =
b) ( ) 5+ (-12) =
c) ( ) 8-(-23) =
d) ( )4 + (+19) =
e) ( ) 11 - (+7) =​

Answer 1

Explicação passo-a-passo:

$A)-21\\B)-7\\C)+31\\D)23\\E)+4$