题目内容

【题目】怎样简便怎样算.
(1) × ÷
(2) ÷7+ ×
(3) ×(18+
(4) ×0.25+ ×
(5)86×
(6) ÷( +

【答案】
(1)解: × ÷

= ÷

=


(2)解: ÷7+ ×

= × + ×

=( + )×

= ×

=


(3)解: ×(18+

= ×18+ ×

=15+

=15


(4)解: ×0.25+ ×

= ×(0.25+

= ×1

=


(5)解:86×

=(85+1)×

=85× +1×

=4+

=4


(6)解: ÷( +

= ÷

=


【解析】(1)按照从左向右的顺序进行计算;(2)、(3)、(4)、(5)根据乘法分配律进行简算;(6)先算小括号里面的加法,再算除法.

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