Question

calcule: a)1/2+3/4-7/8 b) 4 - (-1/2 + 2² + 1)

Answer 1

a)

1/2 + 3/4 -7/8

(4 + 6 - 7)/8

3/8

b)

4 - (-1/2 + 2² + 1)

4 - ((-1 + 8 + 2)/2)

4 - 9/2

-1/2