题目内容

【题目】简便计算。

53.813.6516.35 25×38.6×4

24×10.2  0.73×9.90.1×0.73

【答案】23.83860

244.87.3

【解析】

根据加法的结合律,乘法的结合律及分配律进行简算。

53.813.6516.35

=53.8-(13.65+16.35

=53.830

=23.8

25×38.6×4

=25×4×38.6

=100×38.6

=3860

24×10.2

=24×10+0.2

=24×10+24×0.2

=240+4.8

=244.8

0.73×9.90.1×0.73

=0.73×9.90.1

=0.73×10

=7.3

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