-4.99*12简便计算

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-4.99*12简便计算
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-4.99*12简便计算
-4.99*12简便计算

-4.99*12简便计算
-4.99*12
=(-5+0.01)*12
=-5*12+0.12
=-60+0.12
=-59.88

-(5-0.01)*12=-60+0.12=-59.88

-4.99*12=(0.01-5)*12=0.12-60=-59.88

11111111

-4.99*12
=-(5-0.01)*12
=-5*12+0.01*12
=-59.88

-4.99*12
=-(5-0.01)*12
=-5*12+0.01*12
=-59.88

等于-5*12-(-0.01*12)
=-60-(-0.12)
=-60+0.12
=-59.82