81.81/18.18简便运算

问题描述:

81.81/18.18简便运算

9*9*9*9/9*2*9*2=81/4

9*9.09/9*2.02=9*1.01/2*1.01=9/2

81.81÷18.18
=9.9 ÷ 2.2
=9/2
=4.5

=(9×9.09)/(2×9.09)
=9/2