a: 5/3=10/6=25/15=35/21

b: 5/7=35/49

6/15=12/30

4/5=16/20

c: 6=216/36=324/54=108/18

a)\(\dfrac{5}{3}=\dfrac{10}{6}=\dfrac{25}{15}=\dfrac{35}{21}\)

b)\(\dfrac{5}{7}=\dfrac{35}{49};\dfrac{6}{15}=\dfrac{12}{30};\dfrac{4}{5}=\dfrac{16}{20}\)

c) \(6=\dfrac{216}{36}=\dfrac{324}{54}=\dfrac{108}{18}\)

Lê Kim Việt Hoàngcute2A2

b1

2/3=8/12

15/20=3/4=9/12

77/66=7/6=14/12

25/50=1/2=6/12

b2

5/8=45/72

20/15=4/3=96/72

24/32=3/4=54/72

15/18=5/6=60/72

77/99=7/9=56/72

k nha hok tốt

4/5=12/15

3=45/15

MSC=12

\(\frac{2}{3}=\frac{8}{12}\)

\(\frac{15}{20}=\frac{3}{4}=\frac{9}{12}\)

\(\frac{77}{66}=\frac{7}{6}=\frac{14}{12}\)

\(\frac{25}{50}=\frac{1}{2}=\frac{6}{12}\)

Có phải như này ko?

thành 8/12 ; 9/12 ; 14/12 ; 6/12 tick cho mình nhé

2/3=8/12

15/20=9/12

77/66= ko biết

25/50= cũng ko biết

\(\frac{4}{5}=\frac{4\cdot3}{5\cdot3}=\frac{12}{15}\)

\(3=\frac{3}{1}=\frac{3\cdot15}{1\cdot15}=\frac{45}{15}\)

a.

\(4=\dfrac{48}{12}\);\(\dfrac{9}{4}=\dfrac{27}{12}\)

b. \(\dfrac{5}{8}=\dfrac{15}{24};\dfrac{25}{30}=\dfrac{20}{24}\)

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Bài 2:

\(\frac{13}{36}=\frac{1+5+7}{36}=\frac{1}{36}+\frac{5}{36}+\frac{7}{36}\)

\(\frac{31}{60}=\frac{1+23+7}{60}=\frac{1}{60}+\frac{23}{60}+\frac{7}{60}\)

Bài 1:

\(\frac{25}{27}=\frac{1+3+9+3+9}{27}=\frac{1}{27}+\frac19+\frac13+\frac19+\frac13\)

\(\frac{15}{16}=\frac{8+7}{16}=\frac12+\frac{7}{16}=\frac12+\frac{4+3}{16}=\frac12+\frac14+\frac{3}{16}\)

\(=\frac12+\frac14+\frac{2+1}{16}=\frac12+\frac14+\frac18+\frac{1}{16}\)