Решить: 1/5+ 1 5/6 + 2 7/10
1/5 + 1 5/6 + 2 7/10 = 1/5 + 11/6 + 27/10 =(1 × 6 + 11 × 5 + 27 × 3)/30 = 6/30 + 55/30 + 81/30 = 142/30 = 71/15 = 4 11/15