MSC : `24`

`-5/6=-5.4/6.4=-20/24`

`7/8=7.3/8.3=21/24`

`7/24=7/24`

`-3/4=-3.6/4.6=-18/24`

`2/3=2.8/3.8=16/24`

`1=24/24`

Sắp xếp các phân số sau theo thứ tự tăng dần : 

`-20/24;-18/24;7/24;16/24;21/24;24/24`

\(\dfrac{-1}{9}.\dfrac{-3}{5}+\dfrac{5}{-6}.\dfrac{-3}{5}-\dfrac{7}{2}.\dfrac{3}{5}\)

\(=\dfrac{3}{5}.\left(\dfrac{1}{9}+\dfrac{5}{6}-\dfrac{7}{2}\right)\)

\(=\dfrac{3}{5}.\left(\dfrac{2}{18}+\dfrac{15}{18}-\dfrac{63}{18}\right)\)

\(=\dfrac{3}{5}.\left(-\dfrac{23}{9}\right)\)

\(=-\dfrac{69}{45}\)

1/3 - 1/4 = 4/12 - 3/12 = 1/12

2/7 . 14/5 - 1 = 2.14/7.5 - 1 =4/5 - 1 = -1/5

3/4 - 1/25 x 5 = 3/4 - 1.5/25.1 = 3/4 - 1/5 = 11/20

-8 . ( 6. 1/24 ) = -8 . ( 6.1/24.1 ) = -8 . 1/4 = -8 . 1/4.1 = -2

1/3-1/4=1/12

2/7.14/5-1=-1/5

3/4-1/25.5=11/20

-8.(6.1/24)=-2 nhé

CHÚC BẠN HỌC GIỎI

K MÌNH NHÉ

a)1/12

b)-1/5

c)11/20

d)-2

k tui di

làm rồi

lam giup minh voi

\(\frac{5}{4}-\frac{4}{5}\times\frac{4}{3}\)

\(=\frac{5}{4}-\frac{16}{15}\)

\(=\frac{11}{60}\)

\(\frac{3}{7}:\frac{1}{2}\times\frac{14}{15}\)

\(=\frac{3}{7}\times\frac{2}{1}\times\frac{14}{15}\)

\(=\frac{4}{5}\)

\(\frac{2}{5}+x=\frac{6}{7}\)

           \(x=\frac{6}{7}-\frac{2}{5}\)

           \(x=\frac{16}{35}\)

\(\frac{1}{3}:x=\frac{8}{9}\)

       \(x=\frac{1}{3}:\frac{8}{9}\)

       \(x=\frac{3}{8}\)

a)

`9/2-3`

`=9/2-6/2`

`=3/2`

b)

`8/5xx25/12`

`=10/3`

c)

`4:3/7`

`=4xx7/3`

`=28/3`

thank you bạn

\(=\dfrac{1}{3}:\dfrac{7\cdot\left(5+3\right)}{18\cdot\left(53-11\right)}\) 

\(=\dfrac{1}{3}:\dfrac{7\cdot8}{18\cdot42}\) 

\(=\dfrac{1}{3}:\dfrac{7\cdot2\cdot2\cdot2}{3\cdot3\cdot2\cdot2\cdot3\cdot7}\)

\(=\dfrac{1}{3}:\dfrac{2}{3\cdot3\cdot3}\)

\(=\dfrac{1}{3}\cdot\dfrac{27}{2}\)

\(=\dfrac{9}{2}\)

1+2+3+...+2022=[(2022-1):1+1]x(2022+1):2=2022x2023:2=2045253