10.1*0.99的简便计算
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10.1*0.99的简便计算
10.1*0.99的简便计算
10.1*0.99的简便计算
10.1*0.99
=10.1*9.9/10
=[(10+0.1)*(10-0.1)]/10
平方差公式
=(10*10-0.1*0.1)/10
=(100-0.01)/10
=99.99/10
=9.999
10.1*0.99的简便计算
10.1*0.99的简便计算
10.1*0.99的简便计算
10.1*0.99
=10.1*9.9/10
=[(10+0.1)*(10-0.1)]/10
平方差公式
=(10*10-0.1*0.1)/10
=(100-0.01)/10
=99.99/10
=9.999