(2 3/4: 1 1/10 + 3 1/3) : 5/4
----------------------------------- =?
2 1/2 - 1 1/3

(2 3/4 : 1 1/10 + 3 1/3) : 5/4---------------------------------- =2 1/2 - 1 1/3(11/4 : 11/10 + 3 1/3) : 5/4---------------------------------- =2 3/6 - 1 2/6(11/4 * 10/11 + 3 1/3) : 5/4---------------------------------- =1 1/6(10/4 + 3 1/3) : 5/4----------------------------- =1 1/6(2 2/4 + 3 1/3) : 5/4----------------------------- =1 1/6(2 1/2 + 3 1/3) : 5/4----------------------------- =1 1/6(2 3/6 + 3 2/6) : 5/4----------------------------- =1 1/65 5/6 : 5/4------------------ =7/635/6 * 4/5------------------ =7/67 * 2/ 3------------- =7/614/3 ------- =7/614/3 * 6/7= 2*2= 4