7.8×3.6+78×6.4怎样简便计算把算式详细列出来,哥哥姐姐呀

7.8*3.6+7.8*10*6.4=7.8*（3.6+64）=527.28

7.8*3.6+7.8*64
=7.8*(3.6+64)
=7.8*67.6
=7.8*60+7.8*7+7.8*0.6
=846+40.6+8.46
=895.06

我觉得题目应该是7.8*36+78*6.4=78*3.6+78*6.4=78*(3.6+6.4)=78*10=780

7.8×3.6+78×6.4
=7.8*(3.6+6.4)
=7.8*10
=78