题目内容
【题目】混合运算.
18÷÷ [4﹣(﹣)]× (+)×32
×+× +× 44﹣72×.
【答案】(1)18÷÷
=30÷
=45;
(2)[4﹣(﹣)]×
=[4﹣]×
=×
=;
(3)(+)×32
=×32+×32
=24+20
=44;
(4)×+×
=×(+)
=×1
=;
(5)+×
=+
=;
(6)44﹣72×
=44﹣30
=14.
【解析】
试题分析:(1)按照从左向右的顺序进行计算;
(2)先算小括号里面的减法,再算中括号里面的减法,最后算乘法;
(3)、(4)根据乘法分配律进行简算;
(5)先算乘法,再算加法;
(6)先算乘法,再算减法.
解:(1)18÷÷
=30÷
=45;
(2)[4﹣(﹣)]×
=[4﹣]×
=×
=;
(3)(+)×32
=×32+×32
=24+20
=44;
(4)×+×
=×(+)
=×1
=;
(5)+×
=+
=;
(6)44﹣72×
=44﹣30
=14.
练习册系列答案
相关题目