Câu hỏi của Linh

Question

M Mike cần gấp bài này ạ.(phải trình bày rõ ràng)

Nguyễn Lê Phước Thịnh · Accepted Answer

$\dfrac{2}{7}\cdot\dfrac{14}{15}\cdot\dfrac{5}{6}:\dfrac{3}{8}:\dfrac{2020}{2021}$

$=\dfrac{2}{7}\cdot\dfrac{14}{15}\cdot\dfrac{5}{6}\cdot\dfrac{8}{3}\cdot\dfrac{2021}{2020}$

$=\dfrac{14}{7}\cdot\dfrac{5}{15}\cdot\dfrac{8}{6}\cdot\dfrac{2}{3}\cdot\dfrac{2021}{2020}$

$=2\cdot\dfrac{1}{3}\cdot\dfrac{4}{3}\cdot\dfrac{2}{3}\cdot\dfrac{2021}{2020}$

$=\dfrac{8084}{13635}$

Câu trả lời:

$\dfrac{2}{7}\cdot\dfrac{14}{15}\cdot\dfrac{5}{6}:\dfrac{3}{8}:\dfrac{2020}{2021}$

$=\dfrac{2}{7}\cdot\dfrac{14}{15}\cdot\dfrac{5}{6}\cdot\dfrac{8}{3}\cdot\dfrac{2021}{2020}$

$=\dfrac{14}{7}\cdot\dfrac{5}{15}\cdot\dfrac{8}{6}\cdot\dfrac{2}{3}\cdot\dfrac{2021}{2020}$

$=2\cdot\dfrac{1}{3}\cdot\dfrac{4}{3}\cdot\dfrac{2}{3}\cdot\dfrac{2021}{2020}$

$=\dfrac{8084}{13635}$