11/ 32 > 16/ 49

58/89<36/53

11/32>16/49

58/89<36/53

a: \(\frac{11}{32}>\frac{11}{33}=\frac13\)

\(\frac13=\frac{16}{48}>\frac{16}{49}\)

Do đó: \(\frac{11}{32}>\frac{16}{49}\)

b: \(\frac{46}{71}<\frac{46}{69}=\frac23\)

\(\frac23=\frac{38}{57}<\frac{38}{55}\)

Do đó: \(\frac{46}{71}<\frac{38}{55}\)

c: \(\frac{12}{47}>\frac{12}{48}=\frac14\)

\(\frac14=\frac{29}{116}>\frac{29}{117}\)

Do đó: \(\frac{12}{47}>\frac{29}{117}\)

d: \(\frac{18}{53}>\frac{18}{54}=\frac13\)

\(\frac13=\frac{34}{102}>\frac{34}{103}\)

Do đó: \(\frac{18}{53}>\frac{34}{103}\)

a.<

b.>

a) <
b) >
quy đồng lên là được

Ta thấy:  

\(\frac{9}{10}< 1< \frac{12}{11}\)

\(\Rightarrow\frac{9}{10}< \frac{12}{11}\)

a / 12 / 11

b/   16/17

a) 8-5/ 8=1-5/8

49-32/ 49=1-32/49

mà 5/8<32/49

=>1-5/8>1-32/49

=> 3/8>17/49

tg tự

b) >

c) <

\(\frac{3}{8}v\frac{17}{49}tc:\)\(\frac{3}{8}=\frac{18}{48}>\frac{17}{48}>\frac{17}{49}\Rightarrow\frac{3}{8}>\frac{17}{49}\)

\(\frac{16}{27}v\frac{15}{29}tc:\frac{16}{27}>\frac{15}{27}>\frac{15}{29}\Rightarrow\frac{16}{27}>\frac{15}{29}\)

\(\frac{15}{59}v\frac{24}{47}tc:\frac{15}{59}< \frac{24}{59}< \frac{24}{47}\Rightarrow\frac{15}{59}< \frac{24}{47}\)

a) 49-6/ 49=1-6/49

35-4/ 35=1-4/35

Mà 6/49>4/35

=> 1-6/49<1-4/35

=>43/49<31/35

các câu sau lm tương tự

b) > 

c) <

a) 49-6/ 49=1-6/49

35-4/ 35=1-4/35

Mà 6/49>4/35

=>1-6/49<1-4/35

=>43/49<31/35

các câu sau lm tương tự

b) >

c) <

a) 49-6/ 49=1-6/49

35-4/ 35=1-4/35

mà 6/49>4/35

=>1-6/49 < 1-4/35

=>43/49 < 31/35

các câu sau tương tự

b) >

c) <