7,9,1,3 算3个算式,最后一个算式等于24 怎么算
问题描述:
7,9,1,3 算3个算式,最后一个算式等于24 怎么算
答
(7+1)*9除以3=24
答
((7+1)*9)/3
(7+1)*(9/3)
(7+1)/(3/9)
((7+1)/3)*9
9*((7+1)/3)
(9*(7+1))/3
9*((1+7)/3)
(9*(1+7))/3
9/(3/(7+1))
(9/3)*(7+1)
9/(3/(1+7))
(9/3)*(1+7)
((1+7)*9)/3
(1+7)*(9/3)
(1+7)/(3/9)
((1+7)/3)*9