K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

5 tháng 7 2018

Ta thực hiện  − 24 11 + 2 11 + − 19 13 + − 20 13 = ( − 2 ) + ( − 3 ) = − 5

18 tháng 9 2023

a) \(=\left(13\dfrac{2}{7}+2\dfrac{5}{7}\right):\left(-\dfrac{8}{9}\right)\)

\(=16:\dfrac{-8}{9}=\dfrac{-8\cdot\left(-2\right)\cdot9}{-8}=-18\)

b) 

\(=\left(\dfrac{-6}{11}\cdot\dfrac{11}{-6}\right)\cdot\dfrac{7\cdot10\cdot\left(-2\right)}{10}\)

\(=-14\)

c) \(=\dfrac{-1}{2}\cdot\dfrac{4}{3}\cdot\dfrac{-7}{2}\)

\(=\dfrac{-1\cdot2\cdot2\cdot\left(-7\right)}{2\cdot3\cdot2}=\dfrac{7}{3}\)

\(a.\left[-\dfrac{6}{11}.\dfrac{11}{-6}\right].\dfrac{7}{10}.\left(-20\right)=1.7.\left(-2\right)=-14\)

\(b.\dfrac{-1}{2}:\dfrac{3}{4}.\dfrac{-7}{2}=\dfrac{7}{4}:\dfrac{3}{4}=\dfrac{7}{3}\)

\(c.\dfrac{93}{7}:-\dfrac{8}{9}+\dfrac{19}{7}:\dfrac{-8}{9}=\left(\dfrac{93}{7}+\dfrac{19}{7}\right):-\dfrac{8}{9}=\dfrac{-9}{8}.\dfrac{112}{7}=-18\)

12 tháng 10 2017

Ta thực hiện  − 2 24 + − 20 24 + − 32 24 = − 54 24 = − 9 4

30 tháng 11 2017

\(\frac{11}{15}+\frac{23}{16}-\left(5+\frac{27}{16}-\frac{19}{15}\right)+\left(\frac{-1}{2}\right)^2\)

\(=\frac{11}{15}+\frac{23}{16}-5-\frac{27}{16}+\frac{19}{15}+\frac{1}{4}\)

\(=\left(\frac{11}{15}+\frac{19}{15}\right)+\left(\frac{23}{16}-\frac{27}{16}\right)-5+\frac{1}{4}\)

\(=\frac{30}{15}-\frac{4}{16}-5+\frac{1}{4}\)

\(=2-\frac{1}{4}-5+\frac{1}{4}\)

\(=-3\)

học tốt ngôlãmtân

30 tháng 11 2017

\(\frac{11}{15}+\frac{23}{16}-\left(5+\frac{27}{16}-\frac{19}{15}\right)+\left(-\frac{1}{2}\right)^2\) = \(\frac{11}{15}+\frac{23}{16}-5-\frac{27}{16}+\frac{19}{15}+\frac{1}{4}\)

\(=2-\frac{1}{4}-5+\frac{1}{4}=2-5=-3\)

Kb với mình nha!

a: \(=\dfrac{7}{2}\left(-\dfrac{3}{4}+\dfrac{5}{13}-\dfrac{9}{4}-\dfrac{8}{13}\right)=\dfrac{7}{2}\cdot\left(-3-\dfrac{3}{13}\right)=\dfrac{7}{2}\cdot\dfrac{-42}{13}=\dfrac{-147}{13}\)

b: \(=-12+\dfrac{8}{9}-\dfrac{5}{18}=\dfrac{-216}{18}+\dfrac{16}{18}-\dfrac{5}{18}=\dfrac{-205}{18}\)

c: \(=\dfrac{45}{4}-\dfrac{19}{7}-\dfrac{21}{4}=6-\dfrac{19}{7}=\dfrac{23}{7}\)

d: \(=\dfrac{-1}{4}\left(\dfrac{152}{11}+\dfrac{68}{11}\right)=\dfrac{-1}{4}\cdot20=-5\)

2 tháng 11 2021

A= \(\dfrac{11}{9}\).\(\dfrac{-3}{2}\)\(\dfrac{11}{9}\).\(\dfrac{15}{2}\)+(2021)0

\(\dfrac{11}{9}\)(\(\dfrac{-3}{2}\)-\(\dfrac{15}{2}\)) + 1

\(\dfrac{11}{9}\)(-9) + 1

= -11 + 1

= -10

2 tháng 11 2021

Lần sau bn ko đc phép chuyển \(\left(-2021\right)^0\) sang \(\left(2021\right)^0\) đou nha

25 tháng 9 2016

a, ( 1/2 - 13/14 ) : 5/7 - ( -2/21 + 1/7 ) : 5/7

= ( 7/14 - 13/14 ) : 5/7 - ( -2/21 + 3/21 ) : 5/7

= -3/7 : 5/7 - 1/21 : 5/7

= -3/7 . 7/5 - 1/21 . 7/5

= ( -3/7 - 1/21 ) . 7/5

= ( -9/7+ -1/21 ) . 7/5

= -10/21 . 7/5

= -2/3

b, (68/5 + 19/4 ) - 43/5

= 68/5 + 19/4 - 43/5

= ( 68/5 - 43/5 ) + 19/4

= 5 +19/4

= 39/4

c, ( 93/11 + 29/8 ) - 38/11

= 93/11 + 29/8 - 38/11

= ( 93/11 - 38/11 ) + 29/8

= 5 + 29/8

=69/8

d, 4/9 : ( -1/7 ) + 59/9 : ( -1/7 )

= 4/9 . -7 + 59/9 . -7

= ( 4/9 + 59/9 ) . -7

= 7 . -7

= -49

20 tháng 2 2020

\(\left(\frac{-24}{11}\right)+\left(\frac{-19}{13}\right)+\frac{2}{11}+\left(\frac{-20}{13}\right)\)

=> \(\left[\left(\frac{-24}{11}\right)+\frac{2}{11}\right]+\left[\left(\frac{-19}{13}\right)+\left(\frac{-20}{13}\right)\right]\)

=> \(\left(\frac{-22}{11}\right)+\left(\frac{-39}{13}\right)\)

=> \(-2+-3=-5\)