(6,7/12-3,17/36)•1,1/2÷(1,1/3+1,1/2)

(6 7/12 - 3 17/36) * 2,5 - 4 1/3 : 0,65 = 1 1/9

1) 6 7/12 - 3 17/36 = 6 21/36 - 3 17/36 = 3 4/36 = 3 1/9

2) 3 1/9 * 2,5 = 28/9 * 25/10 = 350/45 = 7 35/45 = 7 7/9

3) 4 1/3 : 0,65 = 13/3 : 65/100 = 13/3 * 100/65 = 100/15 = 6 10/15 = 6 2/3

4) 7 7/9 - 6 2/3 = 7 7/9 - 6 6/9 = 1 1/9