4°-OPERACIONES COMBINADAS-MAT

2/3 - (1/2 + 1/8)

1/2 + (2/3 x 5/6)

1/5 x (1/2 + 1/3)

1/2 : (1/4 + 1/3)

2/3 - (1/6 + 1/9)

2/5 +(1/2 x 2/8)

1/6

21/40

1/24

31/40

1/18

6/7