\(\dfrac{55}{57}< 1< \dfrac{89}{43}\)

\(\Rightarrow\dfrac{55}{57}< \dfrac{89}{43}\)

phân số tg là 88/99

88/99<89/99

88/99>88/104=44/57

nên 44/57<89/99

HYC-30/1/2022

ai mà biết ?

\(\dfrac{4}{7}v\text{à }\dfrac{16}{63}\\ \dfrac{4}{7}=\dfrac{4\cdot9}{7\cdot9}=\dfrac{36}{63}\\ \dfrac{36}{63}>\dfrac{16}{63}\\ \Rightarrow\dfrac{4}{7}>\dfrac{16}{36}\) 

\(\dfrac{4}{17}\) và \(\dfrac{16}{63}\)

\(\dfrac{4}{63}>\dfrac{16}{63}\)

\(=>\dfrac{4}{17}>\dfrac{16}{63}\)

\(\dfrac{5}{29}\) và \(\dfrac{7}{33}\)

\(\dfrac{5}{33}< \dfrac{7}{33}\)

\(=>\dfrac{5}{29}< \dfrac{7}{33}\)

\(\dfrac{44}{57}\) và \(\dfrac{89}{99}\)

\(\dfrac{44}{99}< \dfrac{89}{99}\)

\(=>\dfrac{44}{57}< \dfrac{89}{99}\)

\(\dfrac{19}{53}\) và \(\dfrac{30}{73}\)

\(\dfrac{19}{73}>\dfrac{30}{73}\)

\(=>\dfrac{19}{53}>\dfrac{30}{73}\)

Ta có:

4/17<4/16=1/4

16/63>16/64=1/4

Do 4/17<1/4<16/63 

Nên 16/63>4/17

Ta có : \(\frac{2003.2004-1}{2003.2004}=\frac{2003.2004}{2003.2004}-\frac{1}{2003.2004}=1-\frac{1}{2003.2004}\)

            \(\frac{2004.2005-1}{2004.2005}=\frac{2004.2005}{2004.2005}-\frac{1}{2004.2005}=1-\frac{1}{2004.2005}\)

Vì \(\frac{1}{2003.2004}>\frac{1}{2004.2005}\)

Nên : \(\frac{2003.2004-1}{2003.2004}< \frac{2004.2005-1}{2004.2005}\)

câu 2003.2004 lớn hơn 2004.2005

5/-57<4/113

a)  − 1 20 > − 11 40

b)  5 9 > 2 9

a: 31/32>0>-5/57

b: -15/81<0<7/90

3/

a/ \(\dfrac{31}{32}>0>\dfrac{-5}{57}\)

b/ \(\dfrac{-15}{81}< 0< \dfrac{7}{90}\)

\(\dfrac{31}{32}>0>\dfrac{-5}{57}\)