matematika ada yg tahu??

0,75 = 3/4
5 1/3 = 16/3
1 1/4 = 5/4

(3/4 × 16/3) - (5/4 ÷ 5/2)
3 coret silang sama angka 3 = 1
16 coret silang sama angka 4 = 4
(4) - (5/4 × 2/5)
5 coret silang sama angka 5 = 1
2 coret silang sama angka 4 = 1/2
4 - 1/2 =
4 - 0,5 = 3,5

maaf kalo salah