Question

EXPRESSOES NUMERICAS
A)7-(1+3)=
B)9-(5-1+2)=
C)10-(2+5)+4=
D)(13-7)+8-1=
E)15-(3+2)-6=

Answer 1

a) 7 - (1+3)
7 - 4= 3
b)9 - (5-1+2) 
9 - 6 = 3
c) 10 - (2+5) + 4
10 - 7 + 4 = 7
d) (13 - 7) +8 - 1
6+8 -1 = 13
15 - (3+2) - 6 
15 - 5 - 6 = 4