50*9.813*0.9+13*0.1
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50*9.813*0.9+13*0.1
![50*9.813*0.9+13*0.1](/uploads/image/z/15959484-36-4.jpg?t=50%2A9.813%2A0.9%2B13%2A0.1)
50*9.8
=50*(10-0.2)
=50*10-50*0.2
=500-10
=490
13*0.9+13*0.1
=13*(0.9+0.1)
=13*1
=13
=50*(10-0.2)
=50*10-50*0.2
=500-10
=490
13*0.9+13*0.1
=13*(0.9+0.1)
=13*1
=13
0.9+0.1-0.9+0.1简单方法怎么算
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简算.0.1+0.2+0.3+.+0.8+0.9+1
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