\(\dfrac{\dfrac{180}{7}}{36};\dfrac{14}{36}\)

\(\dfrac{15}{36};\dfrac{14}{36}\)

5/12=15/36

7/18=14/36

\(\dfrac{5}{12}=\dfrac{5\times3}{12\times3}=\dfrac{15}{36};\dfrac{7}{18}=\dfrac{7\times2}{18\times2}=\dfrac{14}{36}\)

15/36; 14/36

5/12=5*3/12*3=15/36;7/18=7*2/18*2=14/36

        d/s:15/36;;14/36

15/36 & 14/36

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

a, Phân số đó là \(\frac{7}{9}=\frac{28}{36}\) và \(\frac{5}{12}=\frac{15}{36}\)

b, Phân số đó là \(\frac{4}{7}=\frac{8}{14}\) và \(\hept{\begin{cases}3=\frac{21}{7}\\3=\frac{42}{14}\end{cases}}\)

a,  Phân số đó là 

$\frac{7}{9}=\frac{28}{36}$ và $\frac{5}{12}=\frac{15}{36}$

b, Phân số đó là $\frac{4}{7}=\frac{8}{14}$ và $\text{hept}\{\begin{array}{c}3=\frac{21}{7}\\ 3=\frac{42}{14}\end{array}$

\(a,\dfrac{-1}{3};\dfrac{-2}{3};\dfrac{-20}{30}\)

Bài 2: 

a: 4/-5=-4/5=-8/10=-40/50

7/-4=-7/4=-175/100=-350/200

1/-3=-1/3=-2/6=-3/9

b: 

4/-5=-4/5=-8/10=-40/50

7/-4=-7/4=-175/100=-350/200

1/-3=-1/3=-2/6=-3/9

tích cho mik thì mik trả lời

a \(\dfrac{5}{7};\dfrac{28}{7}\)

b \(\dfrac{27}{33};\dfrac{165}{33}\)

c \(\dfrac{16}{36};\dfrac{21}{36}\)

Msc : 126

126 : 7 = 18

5x18 / 7× 18 = 90/126

126÷ 18 = 7

7×7/18×7=49/126

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