Question

9.86×9.86-9.85×9.87的简便运算是什么？

Answer 1

9.86×9.86-9.85×9.87有关这个算式的简便解答，过程如下：

9.86×9.86-9.85×9.87
=9.86×（9.87-9.85）
=9.86×0.02
=0，19

Answer 2

9.86x9.86-9.85x9.87
＝9.86x9.86-9.85x〈9.86+0.01）
＝9.86x9.86-9.85x9.86-9.85x0.01
＝9.86x（9.86-9.85）-9.85x0.01
＝9.86x0.01-9.85x0.01
＝0.01x（9.86-9.85）
＝0.01x0.01
＝0.0001
最后结果等于0.0001。

Answer 3

9.86×9.86-9.85×9.87
＝9.86x9.86一（9.86十0.01）x9.86
＝9.86x9.86一9.86x9.86一9.86x0.01
＝一0.0986

Answer 4

9.86x9.86-9.85x9.87
=9.86x9.86-[（9.86-0.01）x（9.86+0.01）]
=9.86的平方-（9.86的平方-0.0001）
=0.0001

Answer 5

原式=（9.85+0.01）（9.87－0.01）－9.85×9.87
=9.85×9.87－0.0985+0.0987－0.0001－9.85×9.87
=0.0002－0.0001
=－0.0001