11/9-1/2/4/5-3/8簡便計算

11/9-1/2/4/5-3/8簡便計算

11/9-1/2/4/5-3/8
=11/9-1/2*5/4-3/8
=11/9-5/8-3/8
=11/9-(5/8+3/8)
=11/9-1
=2/9