- \(\dfrac{11}{24}\) : \(\dfrac{17}{23}\) - \(\dfrac{11}{24}\) : \(\dfrac{17}{11}\) - \(\dfrac{1}{12}\)

= - \(\dfrac{11}{24}\) x \(\dfrac{23}{17}\) - \(\dfrac{11}{24}\) x \(\)\(\dfrac{11}{17}\) - \(\dfrac{1}{12}\)

= - \(\dfrac{11}{24}\) x (\(\dfrac{23}{17}\) + \(\dfrac{11}{17}\)) - \(\dfrac{1}{12}\)

= - \(\dfrac{11}{24}\) x 2 - \(\dfrac{1}{12}\)

= - \(\dfrac{11}{12}\) - \(\dfrac{1}{12}\)

=- \(\dfrac{12}{12}\)

= - 1 

=9/11+2/11

=1

`9/11 + 1/12 : 11/24 = 9/11 + 1/12 xx 24/11 = 9/11 + 2/11 = 11/11= 1`

dấu là gì thế bạn ?

dấu cách đó em :> 

`9/11+1/12:11/24=9/11+1/12xx24/11=9/11+[2xx12]/[12xx11]=9/11+2/11=11/11=1`

=9/11+2/11

=1

11 + 67 x 24 + 12 + 55 - 24

= 11 + 55  + 67 x 24 - 24 + 12

= 66 + 24 x (67 - 1) + 12

= 66 + 24 x 66 + 12

= 66 x (24 + 1) + 12

= 66 x 25 + 12 

= 1650 + 12

= 1662

11 + 67 x 24 + 12 + 55 - 24

= 11 + 55 + 24 x ( 67 - 1) + 12

= 66 + 24 x 66 + 12

= 66 x ( 1 + 24 ) + 12

= 66 x 25 + 12

= 1650 + 12

= 1662

2/7 < 4/9

5/7 > 15/26

9/13 < 3/5

6/11 < 3/5

3/7 > 5/11

7/11 > 12/17

13/18 > 15/23

13/6 < 17/9

2/7 < 4/9

57 < 15/26

9/13 > 3/5

6/11 >3/5

7/11 < 12/17

13/18 < 15/23

13/6 < 17/9

11/12-5/12=6/12=1/2

25/24-16/24=9/24=3/8

27/36-15/36=12/36=2/3

k cho mik nhé

giúp với

\(-\dfrac{1}{12}+\left(-\dfrac{5}{6}\right)-\dfrac{4}{3}=-\dfrac{1}{12}-\dfrac{5}{6}-\dfrac{4}{3}=-\dfrac{1}{12}-\dfrac{10}{12}-\dfrac{16}{12}=-\dfrac{27}{12}=-\dfrac{9}{4}\)

Số cần tìm là

11 + 12 - 24 = ( -1)

Đáp số ( - 1 )

11+12-24=

= 23 - 24

= -1

k nha !!!!!!

thank you