17/24x1/5+7/24÷5+1/5=17/24x1/5+7/24x1/5+1/5=(17/24+7/24+1)x1/5=2x1/5=2/5
17/24x1/5+7/24÷5十+1/5=17/24x1/5+7/24x1/5+1/5=(17/24+7/24+1)x1/5=2/5