Đừng có kiểu ấy nhá bài của mn trôi xuống :v

\(\dfrac{7}{15}và\dfrac{5}{13}=\dfrac{7.13}{15.13}=\dfrac{91}{195};\dfrac{5}{13}=\dfrac{5.15}{13.15}=\dfrac{75}{195}\)

\(\dfrac{11}{12}và\dfrac{7}{48}=\dfrac{11.4}{12.4}=\dfrac{44}{48};\dfrac{7}{48}\)

\(\dfrac{24}{35}và\dfrac{21}{7}=\dfrac{24}{35};\dfrac{21}{7}=\dfrac{21.5}{7.5}=\dfrac{105}{35}\)

\(\dfrac{15}{16}và\dfrac{7}{8}=\dfrac{15}{16};\dfrac{7}{8}=\dfrac{7.2}{8.2}=\dfrac{14}{16}\)

MSC:60 NHA BẠN 

ko bé ơi 

a)1/4=15/60;4/5=48/60;2/3=40/60

b)13/24=39/72;11/18=44/72

c)11/16=55/80 và giữ nguyên phan số 17/80

a: \(\frac{23}{35}<\frac{23,1}{35}=0,66\)

\(0,66=\frac{20,46}{31}<\frac{21}{31}\)

Do đó: \(\frac{23}{35}<\frac{21}{31}\)

b: \(\frac{-17}{24}<\frac{-16}{24}=\frac{-2}{3}\)

\(\frac{-2}{3}=\frac{-13}{19,5}<\frac{-13}{28}\)

Do đó: \(-\frac{17}{24}<-\frac{13}{28}\)

c: \(\frac{9}{16}>\frac{8}{16}=\frac12;\frac12=\frac{12}{24}>\frac{11}{24}\)

Do đó: \(\frac{9}{16}>\frac{11}{24}\)

24/16=12/8=6/4

7/4=7/4

24/16=12/8=6/4

7/4=7/4

a/5/9=10/18

b/5/7=25/35

c/9/8=54/48

d/24/25=120/125

e/69/50=276/200

còn bước nhân bạn tự nhân nha

\(\dfrac{5}{12}=\dfrac{5.4}{12.4}=\dfrac{20}{48}\)

\(\dfrac{3}{16}=\dfrac{3.3}{16.3}=\dfrac{9}{48}\)

MTC : 48

\(\dfrac{5}{12}=\dfrac{20}{48}\)

\(\dfrac{3}{16}=\dfrac{9}{48}\)