下面各题怎样简便就怎样计算9.9×25 0.75×0.5×4×0.2 1.25×32×0.25 8.12×4+1.88×4 0.32×13.4-0.32

下面各题怎样简便就怎样计算9.9×250.75×0.5×4×0.21.25×32×0.258.12×4+1.88×40.32×13.4-0.32×3.43.84×99+3... 下面各题怎样简便就怎样计算9.9×25 0.75×0.5×4×0.2 1.25×32×0.25 8.12×4+1.88×4 0.32×13.4-0.32×3.4 3.84×99+3.84 2.009×390+20.09×41+200.9×2 (9.57+9.57+9.57+9.57)×25. 展开
 我来答
旧城TA19
2014-11-04 · 超过79用户采纳过TA的回答
知道答主
回答量:130
采纳率:0%
帮助的人:182万
展开全部
(1)9.9×25,
=(10-0.1)×25,
=10×25-0.1×25,
=250-2.5,
=247.5;

(2)0.75×0.5×4×0.2,
=(0.75×4)×(0.5×0.2),
=3×0.1,
=0.3;

(3)1.25×32×0.25,
=1.25×8×4×0.25,
=(1.25×8)×(0.25×4),
=10×1,
=10;

(4)8.12×4+1.88×4,
=(8.12+1.88)×4,
=10×4,
=40;

(5)0.32×13.4-0.32×3.4,
=0.32×(13.4-3.4),
=0.32×10,
=3.2;

(6)3.84×99+3.84,
=3.84×(99+1),
=3.84×100,
=384;

(7)2.009×390+20.09×41+200.9×2,
=20.09×39+20.09×41+20.09×20,
=20.9×(39+41+20),
=20.9×100,
=2090;

(8)(9.57+9.57+9.57+9.57 )×25,
=(9.57×4)×25,
=9.57×(4×25),
=9.57×100,
=957.

推荐律师服务: 若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询

为你推荐:

下载百度知道APP,抢鲜体验
使用百度知道APP,立即抢鲜体验。你的手机镜头里或许有别人想知道的答案。
扫描二维码下载
×

类别

我们会通过消息、邮箱等方式尽快将举报结果通知您。

说明

0/200

提交
取消

辅 助

模 式