3/8-1/4= 7/30+3/20-4.1/4= 7.1/3-6.7/8= 4/9+11/18+5/27-4.2/3=

→ 3/8 - 1/4 = 3/8 - 2/8 = 1/8

→7/30 + 3/20 - 4 1/4 = 14/60 + 9/60 - 255/60 = -232/60 = -58/15

→ 7 1/3 - 6 7/8 = 22/3 - 55/8 = 176/24 - 165/24 = 11/24

→ 4/9 + 11/18 + 5/27 - 4 2/3 = 48/108 + 66/108 + 20/108 - 504/108 = - 370


semoga membantu