Question

Determine o valor da expressão numérica (-2/5)×(+½)+(+½)²=?

Answer 1

(-2/5)x(+1/2)+(+1/2)^2

(-2/10) + (1/4)

10-4|2
5-2|2
5-1|5
1-1
m.c.m= 2x2x5=> 4x5=> 20

- 4/20 + 5/20

1/20