tolong dijawab pr adik sy nomor 7 sampai 10

7. 3 3/5 × 2 2/3 × 7/12

=18/5 × 8/3 × 7/12
=6/5 ×2× 7/3
= 2/5 × 2× 7
= 28/5
= 5 3/5,5.6

maaf kalo salah...

12 x 0,9 = 10,8
4,25x3,7= 15,725
15:6 = 2,5