Question

商场开展促销活动,每箱苹果135元,买三箱送一箱,一次性买了9箱体每箱便宜多少？

Answer 1

135-135×9÷(9+3)
=135-135×9÷12
=135-135×3/4
=135×(1-3/4)
=135×1/4
=33.75(元)
答：每箱便宜33.75元钱。

追答

135-135×9÷(9+3)
=135-135×9÷12
=135-135×3/4
=135×(1-3/4)
=135×1/4
=33.75(元)
答：每箱便宜33.75元钱。

135-135×9÷(9+3)
=135-135×9÷12
=135-135×3/4
=135×(1-3/4)
=135×1/4
=33.75(元)
答：每箱便宜33.75元钱。

Answer 2

135-135x3÷（3+1）=33.75
商场开展促销活动,每箱苹果135元,买三箱送一箱,一次性买了9箱每箱便宜33.75元。