> 数学 >
0.79乘以9.9怎么用简便方法计算
人气:233 ℃ 时间:2019-10-28 07:37:45
解答
0.79×9.9
=0.79×(10-0.1)
=0.79×10-0.79×0.1
=7.9-0.079
=7.821
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版