17/24×1/5+7/24÷5+15
问题描述:
17/24×1/5+7/24÷5+15
答
17/24×1/5+7/24÷5+15
=17/24×1/5+7/24×1/5+15
=(17/24+7/17)×1/5+15
=1/5+15
=15又1/5