【题目】利用因式分解计算:3.68×15.7-31.4+15.7×0.32.


参考答案:

【答案】31.4

【解析】试题分析:

3.68×15.7-31.4+15.7×0.32

=3.68×15.7+15.7×0.32-31.4

=15.7(3.68+0.32)-31.4

=15.7×4-31.4

=62.8-31.4

=31.4.

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