有道数学题.用简便运算(2.25×2.7×5.1)÷(8.1×0.25×1.7)一一定用简便啊啊!
问题描述:
有道数学题.用简便运算(2.25×2.7×5.1)÷(8.1×0.25×1.7)一一定用简便啊啊!
结果是9
答
(2.25×2.7×5.1)÷(8.1×0.25×1.7)
=2.25÷0.25×(2.7÷8.1)×(5.1÷1.7)
=9×1/3×3
=9