Phân số bằng nhau

\(\dfrac{9}{12}=\dfrac{3}{4}\)

12

12

\(\dfrac{7}{2}=\dfrac{42}{12}=\dfrac{28}{8}=\dfrac{35}{10}\)

7/2 = 42/12 = 28/8 = 35/10

7/2 = 42/12= 28/2= 35/10

\(\dfrac{18}{30}\)

18/30

\(\dfrac{18}{30}\)

1km² = 1 000 000m² 
36dm² = 3600cm²

1km2 =10000m2

36 dm2 =3600cm2

\(1 000 000\) m2
\(36 00 m\)²

\(\dfrac{25}{1}\)

25=25/1

\(\dfrac{25}{1}=25\)

VD:

\(\dfrac{3}{4}=\dfrac{9}{12}\)

hai phân số : \(\dfrac{1}{2}\) và \(\dfrac{2}{4}\) bằng nhau

7/14 = 7/7

Đề bài yêu cầu gì?

???

16/18, 24/27, 32/36, 40/45, 48/54, 56/63

16/18, 24/27, 32/36, 40/45, 48/54, 56/63

\(\dfrac{16}{18},\dfrac{24}{27},\dfrac{32}{36},\dfrac{40}{45},\dfrac{48}{54},\dfrac{56}{63}\)

A

A

A nhá bạn 

????????

quy đồng

thì quy đồng ra