Tolong bantu jawab!!! Kasitau jalannya ya

1. 1/4 + 1/2
= 1/4 + 2/4
= 3/4
2. 2/3 + 2/4
= 8/12 + 6/12
= 14/12
= 1 2/12
= 1 1/6
3. 1/3 + 2/10
= 10/30 + 6/30
= 16/30
= 8/15
4. 1/3 + 1/5
= 5/15 + 3/15
= 8/15
5. 4/9 - 1/6
= 24/54 - 9/54
= 15/54
= 5/18
6. 6/7 - 5/8
= 48/56 - 35/56
= 13/56
7. 2/3 - 4/9
= 6/9 - 4/9
= 2/9
8. 4/5 - 2/7
= 28/35 - 10/35
= 18/35

semoga bermanfaat