题目内容
脱式计算
399÷7+292
(607-252)÷5.
399÷7+292
(607-252)÷5.
分析:(1)先算除法,再算加法;
(2)先算小括号里面的减法,再算除法.
(2)先算小括号里面的减法,再算除法.
解答:解:(1)399÷7+292
=57+292
=349;
(2)(607-252)÷5
=355÷5
=71.
=57+292
=349;
(2)(607-252)÷5
=355÷5
=71.
点评:搞清运算顺序,按照运算顺序计算即可.
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