100.1-903.6*18=?的简便计算

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100.1-903.6*18=?的简便计算
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100.1-903.6*18=?的简便计算
100.1-903.6*18=?的简便计算

100.1-903.6*18=?的简便计算
100.1-903.6*18
=100.1-903.6*(20-2)
=100.1-18072+1807.2
=-18072+1907.3
=-18072+1900+7.3
=-18072-100+2000+7.3
=-16172+7.3
=-16172+10-2.7
=-16164.7

100.1-903.6*18
=100.1-(*1000-6.4)*18
=100+0.1-1800-1.8+64*1.8
=-1700+0.1+63*1.8
=-1700+0.1+9*7*9*0.2
=-1700+0.1+81+81*0.4
=-1700+0.1+81+32.4
=115.5-1700
=100+15.5-100-1600
=1584.5