(1 3/5+1,8)×1/2 (6-4 8/15):2,2 (1,25+1/6)×2,4

Question

(1 3/5+1,8)×1/2
(6-4 8/15):2,2
(1,25+1/6)×2,4

Answer 1

1) (1 3/5 + 1,8) x 1/2 = 3 2/5 x 1/2 = 1 7/10 (1.7) 
2) (6-4 8/15) : 2,2 = 1 7/15 : 2,2 = 2/3 
3) (1,25+1/6) x 2,4 = 1 5/12 x 2.4 = 3 2/5 (3.4)