来源：学生作业帮 编辑：作业帮 分类：数学作业 时间：2024/05/07 11:47:48
求这个简便计算题
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
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