tolong kak no 1 sampai 4 dan cara nya

Mapel : Matematika
Bab : Operasi Hitung Pecahan

Nomor 1
5 4/8 + 9/12 + 2 1/5
= 5 1/2 + 3/4 + 2 1/5
= 5 10/20 + 15/20 + 2 4/20
= 7 29/20
= 8 9/20

Nomor 2
2 1/5 + 1/7 - 2/5
= 2 7/35 + 5/35 - 14/35
= 2 12/35 - 14/35
= 1 47/35 - 14/35
= 1 33/35

Nomor 3
2 1/5 - 3/3 + 4/5
= 2 1/5 - 1 + 4/5
= 1 1/5 + 4/5
= 1 5/5
= 2

Nomor 4
3 1/7 + 12/14 - 1/3
= 3 1/7 + 6/7 - 1/3
= 3 3/21 + 18/21 - 7/21
= 3 21/21 - 7/21
= 3 14/21