用简便方法计算:0.504+21036+0.496+1.64

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用简便方法计算:0.504+21036+0.496+1.64

用简便方法计算:0.504+21036+0.496+1.64
用简便方法计算:0.504+21036+0.496+1.64

用简便方法计算:0.504+21036+0.496+1.64
0.504+0.496+21036+1.64
=1+21036+1.64
=21037+1.64
=21038.64