Question

[꧁༺Lê Thanh Huyền༻꧂]

So sánh

a) \(\dfrac{53}{57}vs\dfrac{531}{571}\)

b) \(\dfrac{25}{26}vs\dfrac{25251}{26261}\)

Answer 1

[GV Nguyễn Trần Thành Đạt]

\(a,\dfrac{53}{57}=\dfrac{53.10}{57.10}=\dfrac{530}{570}=1-\dfrac{40}{570}\\ \dfrac{531}{571}=1-\dfrac{40}{571}\\ Vì:\dfrac{40}{570}>\dfrac{40}{571}\Rightarrow1-\dfrac{40}{570}< 1-\dfrac{40}{571}\\ \Leftrightarrow\dfrac{53}{57}< \dfrac{531}{571}\)

Answer 2

[꧁༺Lê Thanh Huyền༻꧂]

b đâu ạ