5/6x7/8-8/9
=35/48-8/9
=105/144-128/144
=-23/144
5/7-8/1x7/6
=5/7-28/3
=15/21-196/21
=-181/21
5/6 x7/8 - 8/9
= 35/48 - 8/9
= 105/144 - 128/144
= -23/144
5/7 - 8/1 x7/6
= 5/7 - 28/3
= 15/21 - 196/21
= - 181/21
Ủng hộ nha!
cau trả lời là :
23/144
155/21
đs...