Bài 3: 

a: 1/11; 2/11; 3/11; 4/11; 5/11

b: 38/37; 40/37; 56/37; 39/37; 70/37

Bài 3: 

a: 1/11; 2/11; 3/11; 4/11; 5/11

b: 38/37; 40/37; 56/37; 39/37; 70/37

1a.  \(\dfrac{19}{41};\dfrac{201}{307};\dfrac{113}{71};\dfrac{14}{9};\dfrac{36}{1}\)

1b. \(\dfrac{12}{1};\dfrac{79}{1};\dfrac{219}{1};\dfrac{2010}{1};\dfrac{0}{1};\dfrac{1}{1};\dfrac{7981}{1}\)

a) $6:7 = \frac{6}{7}$   ;   $7:9 = \frac{7}{9}$                                                

$5:4 = \frac{5}{4}$   ;     $11:4 = \frac{{11}}{4}$

b) $9:3 = \frac{9}{3} = 3$        

$12:6 = \frac{{12}}{6} = 2$                         

$24:8 = \frac{{24}}{8} = 3$

a) $\frac{1}{2}$ = 1 : 2      ;    $\frac{3}{4}$= 3 : 4                                                  

$\frac{3}{{10}} = 3:10$     ;    $\frac{{11}}{6} = 11:6$

b) Hình 1: Phân số $\frac{3}{3}$ = 1

Hình 2: Phân số $\frac{5}{5}$ = 1

Hình 3: Phân số $\frac{8}{8}$ = 1

a) Viết thương của mỗi phép chia sau dưới dạng phân số (theo mẫu).

13 : 17 = \(\dfrac{13}{17}\)

 21 : 11 = \(\dfrac{22}{11}\)      

40 : 51 = \(\dfrac{40}{51}\)       

72 : 25 = \(\dfrac{72}{25}\)

b) Viết (theo mẫu)

34 : 17 = \(\dfrac{34}{17}\) = 2

20 : 5 =\(\dfrac{20}{5}\) = 4

42 : 42 = \(\dfrac{42}{42}\) = 1         

0 : 6 = \(\dfrac{0}{6}\) = 0

1.
a) 10=\(\dfrac{40}{4}\)

b) 25= \(\dfrac{100}{4}\)

2.

a) 11=\(\dfrac{11}{1}\)

b) 276=\(\dfrac{276}{1}\)

c) 158=\(\dfrac{158}{1}\)

3.

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

hellooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo mấy dứa dở

Helllooooooooooooooooi you khedive have 

a, \(\frac{-3}{1}\), \(\frac{4}{1}\),\(\frac{12}{1}\)

b,\(\frac{12}{3}\). \(\frac{-15}{3}\), \(\frac{33}{3}\)

c, \(\frac{21}{-3}\),\(\frac{48}{-3}\), \(\frac{-66}{-3}\)

a) \(\dfrac{2}{5}=\dfrac{1}{5}\cdot\dfrac{2}{1}\)

\(\dfrac{15}{12}=\dfrac{5}{4}=\dfrac{5}{2}\cdot\dfrac{1}{2}\)

\(\dfrac{5}{-12}=\dfrac{-5}{12}=\dfrac{-5}{3}\cdot\dfrac{1}{4}\)

\(\dfrac{-3}{-4}=\dfrac{3}{4}=\dfrac{3}{2}\cdot\dfrac{1}{2}\)