Question

请问第二题怎么写，还有第一题和第三题麻烦帮我看一下对不对，是用简便方法计算的哟！

Answer 1

=0.78x(10+0.1)
=0.78x10+0.78x0.1
=7.8+0.078
=7.878

追答

其它的对了。

Answer 2

0.78X10.1
=0.78X（10+0.1）
=0.78X10+0.78X0.1
=7.8+0.078
=7.878

Answer 3

0.78*（10+0.1）
0.78*10+0.78*0.1
7.8+0.078=7.878

追答

都对

Answer 4

0.78×（10+0.1)=0.78×10+0.78×0.1=7.8+0.078=7.878

Answer 5

逃犯很成功

Answer 6