a) \(\frac{267}{268}< 1< \frac{1347}{1343}=>\frac{267}{-268}>\frac{-1347}{1343}\)
b) Bó tay :))
c) \(\frac{-18}{31}=\frac{-18.10101}{31.10101}=\frac{-181818}{313131}\)
b) Ta có: -88 * (-13) = 1144
58 * 29 = 1682
=> -88 * (-13) < 58 * 29
=> \(\frac{-13}{58}< \frac{29}{-88}\)
B.lấy 2 số nhân với 3
-13/38×3= -39/38 <-1
29/-88×3=87/_88>-1
Suy ra 29/-88>-13/38