> 数学 >
练习册80) 用简便方法计算 (o.75x42.6—o.574x25+57.4)÷3
人气:436 ℃ 时间:2020-06-07 16:26:23
解答
(o.75x42.6—o.574x25+57.4)÷3
=(o.75x42.6+(—57.4x0.25+57.4))÷3
=0.75x(42.6+57.4)÷3
=0.25x100
=25
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版