Question

Efetue mentalmente as adições algébricas
A -6+8+6-4+4+1
B 4-9+2-1-9-2
C 5+6-7+1+7-10
D 12-6+5-5+6-12

Answer 1

A=9
B=15
C=2
D=0

Espero ter te ajudado.

Answer 2

a)-6+8+6-4+4+1
2+6-4+4+1
8-4+4+1
4+4+1
8+1
9

b)4-9+2-1-9-2
-5+2-1-9-2
-3-1-9-2
-4-9-2
-13-2
-15

c)5+6-7+1+7-10
11-7+1+7-10
4+1+7-10
5+7-10
12-10
2

d)12-6+5-5+6-12
6+5-5+6-12
11-5+6-12
6+6-12
12-12
0