题目内容
【题目】混合运算.
81×7÷9 672÷(3×2 ) 576÷4÷3 399÷7+293.
【答案】63;112;48;350
【解析】
试题分析:(1)(3)按照从左到右的顺序计算;
(2)先算小括号里面的乘法,再算括号外的除法;
(4)先算除法,再算加法.
解:(1)81×7÷9,
=567÷9,
=63;
(2)672÷(3×2 ),
=672÷6,
=112;
(3)576÷4÷3,
=144÷3,
=48;
(4)399÷7+293,
=57+293,
=350.
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