5.42×99简便计算,

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5.42×99简便计算,
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5.42×99简便计算,
5.42×99简便计算,

5.42×99简便计算,
5.42×99,
=5.42×(100-1),
=5.42×100-5.42×1,
=542-5.42,
=536.58;

5.42*99=5.42*(100-1)=542-5.42=536.58