> 数学 >
61.2乘4.2减22.8的简便方法
人气:282 ℃ 时间:2020-05-11 14:06:45
解答
61.2×4.2-22.8
=61.2×9/2-22.8
=30.6×9-22.8
=275.4-22.8
=252.6
推荐
猜你喜欢
© 2026 79432.Com All Rights Reserved.
电脑版|手机版