4 ÷ (1 - 5 ÷ 6)或者 6 ÷ (5 ÷ 4 - 1)求采纳
4/〔1-(5/6)〕=246/〔5/4-1〕=24
6 ÷ ((5 ÷ 4) - 1)
6÷[﹙5÷4﹚-1] =24望采纳,谢谢您!~