来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/06/27 16:31:31
求这个简便计算题
![](http://img.wesiedu.com/upload/e/8f/e8fa549cab1ced3dc9f1a860aa4b773e.jpg)
624-3.2*1.5/0.1
=624-3.2*15
=624- 32-16
=624-48
=624-50+2
=574+2
=576
9.43+0.78-2.43
=(9.43-2.43)+0.78
=7.78
(1/4+3/8)/(1.7-3/5)
=5/8/1.1
=5/8 .8
=5/88
20.8*4/9+20又4/5*5/9
=20.8*4/9+104/9
=1/9*(83.2+104)
=187.2/9
=20.8