а) (1/2 + 1/5) : 2 - 3/10 = б) (3/4 - 5/12) * 8 + 1/18 =

Question

а) (1/2 + 1/5) : 2 - 3/10 =

б) (3/4 - 5/12) * 8 + 1/18 =

Answer 1

 (1/2 + 1/5) : 2 - 3/10 = ((5+2)/(10*2))-((3*2)/(10*2))=1/20

(3/4 - 5/12) * 8 + 1/18 =49/18

Answer 2

 

Б) (3/4 - 5/12) * 8 + 1/18 =49/18