题目内容
【题目】计算(能简算的要简算)
÷(﹣×) ÷+÷ 55×
(﹣×)÷ (0.75﹣)×(+) (﹣)×
【答案】(1)÷(﹣×)=;
(2)÷+÷=;
(3)55×=53;
(4)(﹣×)÷=3;
(5)(0.75﹣)×(+)=;
(6)(﹣)×=.
【解析】
试题分析:(1)先算小括号里面的乘法,再算小括号里面的减法,最后算除法;
(2)、(3)根据乘法分配律进行简算;
(4)先算小括号里面的乘法,再算小括号里面的减法,最后算除法;
(5)先算小括号里面的减法和加法,再算乘法;
(6)先算小括号里面的减法,再算乘法.
解:(1)÷(﹣×)
=÷(﹣)
=÷
=;
(2)÷+÷
=×+×
=(+)×
=11×
=;
(3)55×
=(54+1)×
=54×+1×
=53+
=53;
(4)(﹣×)÷
=(﹣)÷
=÷
=3;
(5)(0.75﹣)×(+)
=×
=;
(6)(﹣)×
=×
=.
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