2.4*20又3/5+33.1*7.6 要简便的呢!

问题描述:

2.4*20又3/5+33.1*7.6 要简便的呢!

2.4*20又3/5+33.1*7.6
=2.4*20.6+20.6*7.6+12.5*7.6
=(2.4+7.6)*20.6+12.5*4*1.9
=10*20.6+50*1.9
=206+95
=301