tolong dikerjakan no 4 dan 5

bismillah
penyelesaian :
[4.] 3 1/2 - 2 1/4 + 4 3/2 =
7/2 - 9/4 + 11/2 =
14/4 - 9/4 + 22/4 =
27/4 =
6 3/4 liter (opsi A)

[5.] 35% : 2 1/4 x 3 1/2 =
35/100 : 2 1/4 x 3 1/2 =
35/100 : 9/4 x 3 1/2 =
35/100 x 4/9 x 3 1/2 =
140/900 x 3 1/2 =
140/900 x 7/2 =
980/1800 =
49/90 (opsi B)
maaf kalau salah