7.5乘以2.3除以7.5乘以2.3用简便方法计算

问题描述:

7.5乘以2.3除以7.5乘以2.3用简便方法计算

7.5*2.3÷7.5*2.3
=7.5÷7.5*2.3*2.3
=2.3^2
=5.29