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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