题目内容

【题目】用简便方法计算

8.37﹣3.25﹣(1.37+2.25)

3.375÷5×

9÷13+13÷9+11÷13+14÷9+6÷13

9966×6+6678×18

3762÷38+82917÷83

【答案】1.5;;5;180000;1;1098.

【解析】

试题分析:(1)变形为(8.37﹣1.37)﹣(3.25+2.25)再计算;

(2)将除法变为乘法,再根据乘法分配律计算;

(3)先计算除法,再算同分母加法,最后相加即可求解;

(4)先变形为3322×18+6678×18,再根据乘法分配律计算;

(5)将分母变形为2014+2012×2014﹣1,再根据乘法分配律计算,最后约分计算即可;

(6)先变形为(3800﹣38)÷38+(83000﹣83)÷83,再根据分配律计算.

解答:解:(1)8.37﹣3.25﹣(1.37+2.25)

=(8.37﹣1.37)﹣(3.25+2.25)

=7﹣5.5

=1.5;

(2)3.375÷5×

=3××

=(3)×

=3×

=

(3)9÷13+13÷9+11÷13+14÷9+6÷13

=++++

=(++)+(+

=2+3

=5;

(4)9966×6+6678×18

=3322×18+6678×18

=(3322+6678)×18

=10000×18

=180000;

(5)

=

=

=1;

(6)3762÷38+82917÷83

=(3800﹣38)÷38+(83000﹣83)÷83

=100﹣1+1000﹣1

=1098.

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