Question

giải hết ra giùm mình

Answer 1

-2020/2021

6/5

Answer 2

-2020/2021.(9/11.2/11)

=-2020/2021.1

=-2020/2021

Answer 3

\(-\dfrac{2020}{2021}\).\(\dfrac{9}{11}+-\dfrac{2020}{2021}\).\(\dfrac{2}{11}\)=\(-\dfrac{2020}{2021}\).\(\left(\dfrac{9}{11}+\dfrac{2}{11}\right)\)

                                        \(=-\dfrac{2020}{2021}\).\(1\)

                                         =\(-\dfrac{2020}{2021}\)

b tự làm dễ mà