kak kasi tau pakai cara ya kak

4 1/2 - 2 6/12 : (2 1/2 + 1 1/4)
= 9/2 - 30/12 : (5/2 + 5/4)
= 9/2 - 30/12 : (10/4 + 5/4)
= 9/2 - 30/12 : 15/4
= 9/2 - 30/12 x 4/15
= 9/2 - 120/180
= 810/180 - 120/180
= 690/180 = 3 150/180 = 3 5/6 (B)