Question

Evaluate. (- 1/2 + 3/4 )

1/5
A) -1 1/4
B) - 5/8
C) 1 1/4
D) 5/8

Answer 1

(- 1 / 2 + 3 / 4 ) * 1 / 5

= ( -1 * 4 + 3 * 2 ) / 2 * 4 * 1 / 5

= (-4 + 6 ) / 8 * 1 / 5

= ( 2 ) / 8 * 1 / 5

= 2 / 8 * 1 / 5

= 1 / 4 * 1 / 5

= 1 / 20

The correct answer is 1/20