> 数学 >
15.5+26.5-20.5的简便计算
人气：276 ℃　时间：2020-06-17 12:56:10
解答
=26.5-(20.5-15.5)
=26.5-5
=21.5那15.5+26,5-20.4=15.5+(26.5-20.4) =15.5+6.1 =21.6
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版