Question

me ajude nos cancelamentos.
a) 16-8-4+16-4+8
b) -23-7+17+6-4+7=

Answer 1

a) 16-8-4+16-4+8

16+16+8-8-4-4

40-16

= 24

.......................................................................................................................................................

b) -23-7+17+6-4+7

-23-7-4+17+6+7

-34+30

= -4