tolong kerjakan nomer 2,4,6 menggunakan cara saya sangat butuh sekali

2. 4/8 - 1/5 = 20/40 - 8/40 = 12/40 = 6/20 = 3/10

berarti jawabanya = b.

4. 4 12/14 = 68/14 + 16/21 = 204/42 + 32/42 = 236/42 = 118/21 = 5 13/21

berarti jawabanya b.

6. 7 + 3 + 5 = 15

1/2 + 2/3 + 3/10 = 15/30 + 20/30 + 9/30 = 44/30 = 22/15 = 1 7/15

sory kalau salah ^_^