迎商三茂大酒店:4.25*5.24+1.52*2.51=? 808*0.125-1600除以16=?都要简便.

来源:百度文库 编辑:杭州交通信息网 时间:2024/05/05 01:56:49
万分感激

1 4.25*5.24+1.52*2.51
=(4+0.25)*(5+0.25-0.01)+(1+0.5+0.02)*(2+0.5+0.01)
=(4*5+4*0.25-4*0.01)+(0.25*5+0.25*0.25- 0.25*0.01)+(2+0.5+0.01+0.5*2+0.5*0.5+0.5*0.01+0.02*2+0.02*0.5+0.02*0.01)
=20.96+1.31+2.51+1.3052
=26.0852

2 808*0.125-1600/16
=(800+8)*1/8-100
=800*1/8+8*1/8-100
=100-100+1
=1

=(800+8)*0.125-100
=800*0.125+8*0.125-100
=100+1-100
=1

6.0852

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