4,5:0,5-1/1per4= pakai cara

4,5 : 0,5 - 1¼
=45/10 : 5/10 - 5/4
=45/10 × 10/5 - 5/4
=450/50 - 5/4
=900/100 - 125/100
=775/100
= 7 75/100
=7¾

Jawab :

4,5 ÷ 0,5 - 1 1/4
= 9 - 1 1/4
= 9 - 5/4
= 31/4
= 7 3/4