20×括号4⼀5-3⼀4括号乘以7⼀15等于多少

20×括号4/5-3/4括号乘以7/15等于多少
2024-11-06 15:06:37
推荐回答(2个)
回答1:

20×括号4/5-3/4括号乘以7/15
=20x4/5x7/15-20x3/4x7/15
=16x7/15-15x7/15
=7又7/15-7/15
=7/15

回答2: