\(\dfrac{8}{20};\dfrac{35}{20}\)

\(\dfrac{3}{8};\dfrac{14}{8}\)

\(\dfrac{8}{20};\dfrac{35}{20}\\ \dfrac{12}{32};\dfrac{56}{32}\)

cho mình đáp án chi tiết hơn đc ko

a: 2/11=4/22

19/22=19/22

b: 6/11=30/55

7/5=77/55

c: 7/8=35/40

8/5=64/40

d: 7/8=21/24

5/6=20/24

a: 2/11=4/22

19/22=19/22

b: 6/11=30/55

7/5=77/55

c: 7/8=35/40

8/5=64/40

d: 7/8=21/24

5/6=20/24

\(\frac{1}{8}\)và   \(\frac{9}{36}\)     (   Mẫu chung nhỏ nhất: \(72\))

Quy đồng: \(\frac{1}{8}=\frac{9}{72}\)

                  \(\frac{9}{36}=\frac{18}{72}\)

Ta có : Và \(\frac{9}{36}\)

\(\frac{9}{36}=\frac{9:9.2}{36:9.2}=\frac{2}{8};\)Và giữ nguyên phân số\(\frac{1}{8}\).

học tốt!!!

MSC nhỏ nhất :72

quy đồng: 1/8= 9/72

                  9/36=18/72

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

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

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

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

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

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) \(\dfrac{8}{12};\dfrac{5}{12};\dfrac{9}{12}\)

\(\dfrac{2}{3};\dfrac{1}{4};\dfrac{5}{9}.\)

Mẫu số chung: \(3\times3\times2\times2=36.\)

\(\Rightarrow\dfrac{2}{3}=\dfrac{24}{36};\dfrac{1}{4}=\dfrac{9}{36};\dfrac{5}{9}=\dfrac{20}{36}.\)

\(\frac{3}{5}=\frac{3\times8}{5\times8}=\frac{24}{40}\)

\(\frac{3}{8}=\frac{3\times5}{8\times5}=\frac{15}{40}\)

\(\frac{3}{10}=\frac{3\times4}{10\times4}=\frac{12}{40}\)

\(\frac{3}{2}=\frac{3\times20}{2\times20}=\frac{60}{40}\)

ghi thiếu bạn ơi

10000000000000000000000000000

`MSC:20`

`1/4=(1xx5)/(4xx5)=5/20`

`2/5=(2xx4)/(5xx4)=8/20`

`1/4=(1xx5)/(4xx5)=5/20`

`2/5=(2xx4)/(5xx4)=8/20`

1/4= 1x5/4x5=5/20

2/5=2x4/5x4=8/20

1/4 và 2/5   MSC: 20

\(\frac{3}{5}=\frac{24}{40};\frac{3}{8}=\frac{15}{40};\frac{3}{10}=\frac{12}{40};\frac{3}{2}=\frac{60}{40}\)

\(\frac{3}{5}=\frac{3\times8}{5\times8}=\frac{24}{40}\)

\(\frac{3}{8}=\frac{3\times5}{8\times5}=\frac{15}{40}\)

\(\frac{3}{10}=\frac{3\times4}{10\times4}=\frac{12}{40}\)

\(\frac{3}{2}=\frac{3\times20}{2\times20}=\frac{60}{40}\)

\(\frac{3}{5}=\frac{3\times8}{5\times8}=\frac{24}{40}\)

\(\frac{3}{8}=\frac{3\times5}{8\times5}=\frac{15}{40}\)

\(\frac{3}{10}=\frac{3\times4}{10\times4}=\frac{12}{40}\)

\(\frac{3}{2}=\frac{3\times20}{2\times20}=\frac{60}{40}\)

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