\(\frac{47}{15}< \frac{65}{21}\)

47/15=329/105>325/105

vay la song

\(-TA\)\(CÓ\)\(:\)

\(\frac{47}{15}\): \(\frac{65}{21}\)\(=\frac{329}{325}\)

khong quy dong tu so va mau so va so sanh hai phan so 47/15 va 65/21

15/47<21/65

\(\frac{15}{47}< \frac{21}{65}\)

tt với Ziiz nha

a/ 10/7 < 5/8           b/ 49/59 < 63/73            c/12/19 > 11/21

d/ 23/27 < 23231/27271           e/ 13/37 > 21/65          g/ 47/15 > 65/21

mik co the lam sai day ban mho kiem tra lai nhe!

Vì    \(\frac{12}{49}< \frac{13}{49}\)

        \(\frac{13}{49}< \frac{13}{47}\)

Nên \(\frac{12}{49}< \frac{13}{47}\)

Ta có 13/47>13/49

Mà 13/49>12/49

=> 12/49<13/47

\(\frac{12}{49}\)và \(\frac{13}{47}\Rightarrow12.47\)và \(49.13\)\(\Rightarrow564\)và \(637\)

vì 564<637

nên \(\frac{12}{49}< \frac{13}{47}\)

+ Ta có:

17/15 > 1; 29/30 < 1

=> 17/15 > 29/30

+ Ta có:

12/48 < 12/47 < 13/47

=> 12/48 < 13/47

+ 15/22 = 60/88 > 60/91

=> 15/22 > 60/91