Question

3.28-3.29×0.9能简便计算吗？

Answer 1

解:可以将3.28运用拆分法分解为3.29-0.01，然后运用提取公因式法提取3.29，按四闭芹信则轿轮运算法首握则进行计算。计算过程
3.28-3.29x0.9
=3.29-0.01-3.29x0.9
=3.29x(1-0.9)-0.01
=3.29ⅹ0.1-0.01
=0.329-0.01
=0.319。

Answer 2

3.28-3.29×0.9
＝3.28-（3.28+0.01）×0.9
＝3.28-3.28×0.9-0.01×0.9
＝3.28（吵掘念1-0.9）-0.009
＝0.328-0.009
＝升困散燃0.319

Answer 3

原式歼拦=3.29-0.01-3.29乘以0.9=3.29-3.29乘盯中以凯改山0.9-0.01=3.29乘以（1-0.9）-0.01=0.329-0.01=0.319