题目内容

【题目】样算简便就怎样算.

1.3﹣+8.7﹣

0.75×467+52.3×7.5+7.5

25×(+)×17

÷[+×﹙]

【答案】7;750;117;

【解析】

试题分析:①1.3﹣+8.7﹣,根据加、减法的运算性质简算;

②0.75×467+52.3×7.5+7.5,应用乘法分配律简算;

③25×(+)×17,应用乘法分配律简算;

÷[+×﹙].先算小括号里面的减法,再算中括号里面的乘法,然后算中括号里面的加法,最后算除法.

解:①1.3﹣+8.7﹣

=(1.3+8.7)﹣(

=10﹣3

=7;

②0.75×467+52.3×7.5+7.5

=7.5×46.7+52.3×7.5+7.5

=7.5×(46.7+52.3+1)

=7.5×100

=750;

③25×(+)×17

=

=100+17

=117;

÷[+×﹙]

=[]

=÷[]

=÷

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