4.5*7.8+5.5*7.8简便怎么算要算式

问题描述:

4.5*7.8+5.5*7.8简便怎么算
要算式

4.5*7.8+5.5*7.8
=(4.5+5.5)*7.8
=10*7.8
=78

4.5*7.8+5.5*7.8
=7.8*(4.5+5.5)
=7.8*10
=78