> 数学 >
13.9×9.9+1.39怎么简算?
人气:333 ℃ 时间:2020-04-10 13:14:56
解答
13.9×9.9+1.39
=13.9×9.9+13.9×0.1
=13.9×(9.9+0.1)
=13.9×10
=139
推荐
猜你喜欢
© 2025 79432.Com All Rights Reserved.
电脑版|手机版