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

\(4=\frac{20}{5}=\frac{32}{8}=\frac{48}{12}\)

\(4=\frac{20}{5}=\frac{32}{8}=\frac{48}{12}\)

ĐÚNG KO ?

a) ^{_{\(\dfrac{20}{4};\dfrac{32}{4};\dfrac{48}{4}\)}}

các phân số đó là :\(\frac{20}{5};\frac{32}{8};\frac{48}{12}\)

4 số hay số 4 vậy?

4 = \(\frac{20}{5}\) = \(\frac{32}{8}\) = \(\frac{48}{12}\)

\(\dfrac{12}{4};\dfrac{15}{5}\)

12/4; 15/5 nhé

\(\dfrac{12}{4};\dfrac{15}{5}\)

4/5 = 4x2/5x2 = 8/10

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

4/5 = 4x4/5x4 = 16/20

4/5 = 4x6/5x6 = 24/30

4/5 = 4x7/5x7 = 18/35

#hoktot

a.7/9 = 7x4/ 9x4 = 28/36 

  5/12 = 5x3/ 12x 3= 15/36 

b. sorry mình ko biết mong bạn thông cảm

c.8= 8/1 = 88/11 

  8= 176/22  88/11 = 16/22

nhanh lên

Ta có: 

15 = 15 1 = 15 × 3 1 × 3 = 45 3 15 = 15 1 = 15 × 5 1 × 5 = 75 5 15 = 15 1 = 15 × 10 1 × 10 = 150 10