\(a,=\dfrac{5}{10};\dfrac{6}{10};\dfrac{2}{10}\)

\(b,=\dfrac{8}{12};\dfrac{5}{12};\dfrac{9}{12}\)

\(\dfrac{1}{2}=\dfrac{1x5x10}{2x5x10}=\dfrac{50}{100}\)

\(\dfrac{3}{5}=\dfrac{3x2x10}{5x2x10}=\dfrac{60}{100}\)

\(\dfrac{2}{10}=\dfrac{2x2x5}{10x2x5}=\dfrac{20}{100}\)

a) \(\dfrac{1}{2};\dfrac{3}{5};\dfrac{2}{10}\)    b) \(\dfrac{2}{3};\dfrac{5}{12};\dfrac{3}{4}\)

a)\(\dfrac{5}{10};\dfrac{6}{10};\dfrac{2}{10}\) b) \(\dfrac{8}{12};\dfrac{5}{12};\dfrac{9}{12}\)

bài3

1. \(\frac{4}{3}\)= \(\frac{4x4}{3x4}\)=\(\frac{20}{12}\)

\(\frac{3}{4}\)=\(\frac{3x3}{4x3}\)=\(\frac{9}{12}\)

2.\(\frac{5}{4}\)=\(\frac{5x6}{4x6}\)=\(\frac{30}{24}\)

\(\frac{5}{6}\)=\(\frac{5x4}{6x4}\)=\(\frac{20}{24}\)

3.\(\frac{3}{8}\)=\(\frac{3x6}{8x6}\)=\(\frac{18}{48}\)

\(\frac{1}{6}\)=\(\frac{1x6}{6x8}\)=\(\frac{6}{48}\)

4.\(\frac{2}{5}\)=\(\frac{2x7}{5x7}\)=\(\frac{14}{35}\)

\(\frac{4}{7}\)=\(\frac{4x5}{7x5}\)=\(\frac{20}{35}\)

TL

Phân số là 3/45/4

HT

Sao lại thế

35/40>16/40

1/12<9/12

16/28<42/28>35/28

4/15<9/15<10/15

Chúc em học tốt

\(\dfrac{35}{40}>\dfrac{16}{40}\)

\(\dfrac{1}{12}< \dfrac{9}{12}\)

\(\dfrac{16}{28}< \dfrac{42}{28}>\dfrac{35}{28}\)

\(\dfrac{4}{15}< \dfrac{9}{15}< \dfrac{10}{15}\)

help me

a: 1/3=20/60

1/4=15/60

4/5=48/60

b: 1/2=6/12

2/3=8/12

3/4=9/12

Bài 3 : 

a: \(MSC:12\\ \dfrac{4}{3}=\dfrac{4\times4}{3\times4}=\dfrac{16}{12};\dfrac{3}{4}=\dfrac{3\times3}{3\times4}=\dfrac{9}{12}\)

b: \(MSC:12\\ \dfrac{5}{4}=\dfrac{5\times3}{4\times3}=\dfrac{15}{12};\dfrac{5}{6}=\dfrac{5\times2}{6\times2}=\dfrac{10}{12}\)

c:\(MSC:24\\ \dfrac{3}{8}=\dfrac{3\times3}{8\times3}=\dfrac{9}{24};\dfrac{1}{6}=\dfrac{1\times2}{6\times2}=\dfrac{2}{12}\)

d: \(MSC:35\\ \dfrac{2}{5}=\dfrac{2\times7}{5\times7}=\dfrac{14}{35};\dfrac{4}{7}=\dfrac{4\times5}{7\times5}=\dfrac{20}{35}\)

Bài 3: 

a: 4/3=16/12

3/4=9/12

b: 5/4=30/24

5/6=20/24

c: 3/8=18/48

1/6=8/48

d: 2/5=14/35

4/7=20/35

Bài 4: 

a: 7/12=28/48

5/48=5/48

b: 4/100=4/100

8/25=32/100

20/35

mày chơi free fire à

- Ta có mẫu số chung là 12.

=> 5/12 ; 8/12 ; 9/12.

Không biết 

a) \(\frac{2}{3}=\frac{2\times5}{3\times5}=\frac{10}{15}\); \(\frac{4}{5}=\frac{4\times3}{5\times3}=\frac{12}{15}\)

b) \(\frac{5}{6}=\frac{5\times2}{6\times2}=\frac{10}{12}\); \(\frac{3}{4}=\frac{3\times3}{4\times3}=\frac{9}{12}\)

Giữ nguyên phân số 11/12

c) \(\frac{7}{8}=\frac{7\times12}{8\times12}=\frac{84}{96}\) ; \(\frac{5}{12}=\frac{5\times8}{12\times8}=\frac{40}{96}\)

a) Mẫu số chung là 15

2/3 = 2x5/3x5 = 10/15

4/5 = 4x3/5x3=12/15

b) Mẫu số chung là 12

5/6 = 5x2/6x2 = 10/12

11/12 giữ nguyên

3/4= 3x3/4x3=9/12

c) Mẫu số chung là 24

7/8 = 7x3/8x3=21/24

5/12=5x2/12x2=10/24

Làm 1 câu thôi nhé. Các câu sau bạn tự làm.

b) (mẫu chung: 12)

\(\frac{5}{6}=\frac{5\times2}{6\times2}=\frac{10}{12}\)

\(\frac{11}{12}\): không cần quy đồng!

\(\frac{3}{4}=\frac{3\times3}{4\times3}=\frac{9}{12}\)