25.2÷(14.2-7.9-2.1)简便计算
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25.2÷(14.2-7.9-2.1)简便计算=25.2÷(14.2-(7.9+2.1))=25.2÷(14.2-10)=25.2÷4.2=6
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25.2÷(14.2-7.9-2.1)简便计算
25.2÷(14.2-7.9-2.1)简便计算=25.2÷(14.2-(7.9+2.1))=25.2÷(14.2-10)=25.2÷4.2=6
此题综合运算先算括号里面的减法,再算除法