Вычислите:(3 1/3+5 1/6)*2/5-2 3/4:(1 1/2-2/5)=?

(3 1/3+5 1/6)*2/5-2 3/4:(1 1/2-2/5)=1 9 /25 3 1/ 3 + 5 1/ 6 = 8 + 1/ 3 + 1/ 6 = 8 + 1·2/ 3·2 + 1·1 /6·1 = 8 + 2/ 6 + 1/ 6 = 8 + 2 + 1/ 6 = 8 3 /6 = 8 1·3 /2·3 = 8 1 /21 1/ 2 - 2 /5 = 1 + 1/ 2 - 2/ 5 = 1 - 1·5/ 2·5 - 2·2 /5·2 = 1 + 5 /10 - 4 /10 = 1 + 5 - 4/ 10 = 1 + 1/ 10 = 1·10/ 10 + 1 /10 = 11 /10 8 1 /2 × 2/ 5 = 1 + 8·2 /2 × 2 /5 = 17 /2 × 2/ 5 = 17·2 /2·5 = 34 /10 = 17·2/ 5·2 = 17 /5 = 2 + 3·5 /5 = 3 2 /52 3 /4 ÷ 11 /10 = 3 + 2·4 /4 ÷ 11/ 10 = 11 /4 ÷ 11/ 10 = 11 /4 × 10 /11 = 11·10/ 4·11 = 110/ 44 = 5·22 /2·22 = 5/ 2 = 1 + 2·2 /2 = 2 1 /2 3 2 /5 ÷ 2 1/ 2 = 2 + 3·5/ 5 ÷ 1 + 2·2 /2 = 17/ 5 ÷ 5 /2 = 17/ 5 × 2 /5 = 17·2 /5·5 = 34/ 25 = 9 + 1·25 /25 = 1 9 /25