33.28-7.69-2.31用简便方法计算
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33.28-7.69-2.31用简便方法计算
33.28-7.69-2.31用简便方法计算
33.28-7.69-2.31用简便方法计算
=33.28-(7.69+2.31)
=33.28-10
=23.28
33.28-7.69-2.31用简便方法计算
33.28-7.69-2.31用简便方法计算
33.28-7.69-2.31用简便方法计算
=33.28-(7.69+2.31)
=33.28-10
=23.28