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)

 \(3:8=\dfrac{3}{8}\)

\(8:9=\dfrac{8}{9}\)

\(4:7=\dfrac{4}{7}\)

\(12:5=\dfrac{12}{5}\)

b)

 \(7=\dfrac{7}{1}\)

\(9=\dfrac{9}{1}\)

\(21=\dfrac{21}{1}\)

\(40=\dfrac{40}{1}\)

6=6/1                             1=1/1

27=27/1                           0=0/1

3=3/1

\(\dfrac{18}{6}=18:6\)

\(\dfrac{50}{10}=50:10\)

\(\dfrac{15}{15}=15:15\)

\(\dfrac{12}{24}=12:24\)

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

5=5/1                      12=12/1

1=1/1                      0=0/1

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

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

b) $9:3 = \frac{9}{3} = 3$        

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

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

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.

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

\(a,5=\dfrac{20}{4};11=\dfrac{44}{4};21=\dfrac{84}{4};200=\dfrac{800}{4};125=\dfrac{500}{4};2000=\dfrac{8000}{4}\\ b,2=\dfrac{108}{54};3=\dfrac{108}{36};108=\dfrac{108}{1};1=\dfrac{108}{108};9=\dfrac{108}{12};4=\dfrac{108}{27};6=\dfrac{108}{18}\)

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