Question

so sánh 23/49 và 31/35

 

Answer 1

Ta có:
\(\dfrac{23}{49}< \dfrac{42}{49}=\dfrac{6}{7}\)
Mà \(\dfrac{6}{7}=\dfrac{6\times5}{7\times5}=\dfrac{30}{35}< \dfrac{31}{35}\)
Do đó \(\dfrac{23}{49}< \dfrac{31}{35}\)

Answer 2

Ta có:
67=6×57×5=3035<313567=6×57×5=3035<3135
Do đó