(3/4+1/6)×3+(5/6-1/2):2/9
3/4 + 1/6 = 9/12 + 2/12 = 11/12 11/12 * 3 = 11/4 5/6 - 1/2 = 5/6 - 3/6 = 2/6 = 1/3 1/3 : 2/9 = 3/2 11/4 + 3/2 = 11/4 + 6/4 = 17/4 = 4 1/4 Ответ 4 1/4
(3/4+1/6)*3+(5/6-1/2):2/9 =4 1/43/4+1/6=9/12+2/12=11/125/6-1/2=5/6-3/6=2/6=1/311/12х3/1=33/12=11/41/3:2/9=1/3х9/2=3/211/4+3/2=11/4+6/4=17/4=4 1/4