pakai jalannya nomor 4

A) 3/8 - 1/4
    = 3/8 - 2/8
    = 1/8

B) 7/30 + 3/20 - 4 1/4
   = 14/60 + 9/60 - 4 15/60
   = 23/60 - 255/60
   = - 232/60
   = - 3 52/60
   = - 13/15

C) 7 1/3 - 6 7/8
   = 7 8/24 - 6 21/24
   = 6 32/24 - 6 21/24
   = 11/24

D) 4/9 + 11/18 + 5/27 - 4 2/3
   = 24/54 + 33/54 + 10/54 - 4 36/54
   = 67/54 - 252/54
   = - 185/54
   = - 3 23/54