a) Ta có: \(\dfrac{11\cdot4-11}{2-13}\)

\(=\dfrac{11\left(4-1\right)}{-11}=\dfrac{4-1}{-1}=-3\)

b) Ta có: \(\dfrac{9\cdot6-9\cdot2}{18}\)

\(=\dfrac{9\cdot\left(6-2\right)}{18}\)

\(=\dfrac{4}{2}=2\)

c) Ta có: \(\dfrac{13\cdot2-13\cdot3}{1-14}\)

\(=\dfrac{13\cdot\left(2-3\right)}{-13}\)

=1

a) Ta có: \(\dfrac{11\cdot4-11}{2-13}\)

\(=\dfrac{11\cdot\left(4-1\right)}{-11}\)

\(=\dfrac{33}{-11}=-3\)

b) Ta có: \(\dfrac{9\cdot6-9\cdot2}{18}\)

\(=\dfrac{9\cdot\left(6-2\right)}{18}\)

\(=\dfrac{36}{18}=2\)

c) Ta có: \(\dfrac{13\cdot2-13\cdot3}{1-14}\)

\(=13\cdot\dfrac{\left(2-3\right)}{-13}\)

=1

phân số tối giản là 1/45 nha

Anh vote cho em với

\(\frac{1}{60}\)bạn nhé

1/60 nhe

a)  9.6 − 9.3 18 = 9. 6 − 3 18 = 9.3 2.9 = 3 2

b)  49 + 7.49 49 = 49. 1 + 7 49 = 8

4/6=2/3

9/12=3/4

10/20=1/2

8/18=4/9

          BẠN CHO MÌNH NHA

2/3 ; 3/4 ; 1/2 ; 4/9

ủng hộ mình lên 100 nha

\(\frac{4}{6}=\frac{4:2}{6:2}=\frac{2}{3};\frac{9}{12}=\frac{9:3}{12:3}=\frac{3}{4};\frac{10}{20}=\frac{10:10}{20:10}=\frac{1}{2};\frac{8}{18}=\frac{8:2}{18:2}=\frac{4}{9}\) 

\(-\frac{5}{10}=-\frac{1}{2}\)

\(\frac{18}{33}=\frac{6}{11}\)

\(\frac{19}{57}\)

\(\frac{-36}{-12}=\frac{3}{2}\)

-1/2

-6/11

1/3

3

Hok tốt!

\(\frac{-5}{10}=\frac{-1}{2}\)            ;                \(\frac{19}{57}=\frac{1}{3}\)

\(\frac{18}{-33}=\frac{-6}{11}\)       ;                  \(\frac{-36}{-12}=3\)

\(\frac{6}{9}=\frac{6:3}{9:3}=\frac{2}{3}\)

\(\frac{18}{48}=\frac{18:6}{48:6}=\frac{3}{8}\)

\(\frac{72}{84}=\frac{72:12}{84:12}=\frac{6}{7}\)

\(\frac{60}{120}=\frac{60:60}{120:60}=\frac{1}{2}\)

\(\frac{6}{9}=\frac{6\div3}{9\div3}=\frac{2}{3}\)

\(\frac{18}{48}=\frac{18\div6}{48\div6}=\frac{3}{8}\)

\(\frac{72}{84}=\frac{72\div12}{84\div12}=\frac{6}{7}\)

\(\frac{60}{120}=\frac{60\div60}{120\div60}=\frac{1}{2}\)

\(=\dfrac{2^{19}\cdot3^9+2^{18}\cdot3^9\cdot5}{2^{19}\cdot3^9+2^{20}\cdot3^{10}}=\dfrac{2^{18}\cdot3^9\cdot\left(2+5\right)}{2^{19}\cdot3^9\cdot7}=\dfrac{1}{2}\)