B

1266

ghê vãi

tham khảo

Câu 1 tự luận thêm phần vễ biểu đồ nhé 

g.\(g,\left[\dfrac{-3}{31}+\left(\dfrac{-28}{31}\right)\right]+\left[\dfrac{-6}{17}+\left(\dfrac{-11}{17}\right)\right]+\left[\dfrac{1}{25}+\left(\dfrac{-1}{5}\right)\right]=-1+(-1)+\left(\dfrac{-4}{25}\right)=\dfrac{-54}{25}h,\dfrac{-1}{3}+\dfrac{2}{5}+\dfrac{-2}{3}+\dfrac{-3}{5}+\dfrac{1}{5}=\left(\dfrac{-1}{3}+\dfrac{-2}{3}\right)+\left(\dfrac{2}{5}+\dfrac{-3}{5}+\dfrac{1}{5}\right)=-1+0=-1\)

lỗi ảnh

brother and sister.

1A

2D

3A

4D

5C

lol