Question

各位帮帮忙，我必采纳！写在纸上回答的采纳优先！

Answer 1

=4/5×2/3+1/5×2/3
=1×2/3
=2/3

=1/4×8/3
=2/3

=5/4×1/4×4/5×4/5
=1/5

=5÷5/8-5/8÷5
=8-1/8
=65/8

Answer 2

我会

追答

先采纳

 

Answer 3

看不清

Answer 4

上百度