12.6*99有简便计算吗?有怎么算

问题描述:

12.6*99有简便计算吗?有怎么算

12.6×(100-1)
=1260-12.6
=1247.4


原式
=12.6*(100-1)
=12.6*100-12.6
=1260-12.6
=1247.4