1. C

2. D

3. D

4. B

5. D

sao để avatar tắng tinh v :>?

em quên :>

I will go out with my friends

\(=\dfrac{4}{5}.\dfrac{6}{2}-\dfrac{4}{5}.\dfrac{8}{9}-\dfrac{1}{2}.1\)

\(=\dfrac{4}{5}.\left(\dfrac{6}{2}-\dfrac{1}{2}\right).1\)

\(=\dfrac{4}{5}.\dfrac{5}{2}.1\)

\(=2.1\)

\(=2\)

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