\(\dfrac{-5}{7}-\dfrac{9}{22}+\dfrac{5}{17}-\dfrac{13}{22}\\ =-\dfrac{5}{7}+\dfrac{5}{17}+\left(-\dfrac{9}{22}-\dfrac{13}{22}\right)\\ =-\dfrac{5}{7}+\dfrac{5}{17}-\dfrac{22}{22}\\ =-\dfrac{5}{7}+\dfrac{5}{17}-1\\ =\dfrac{-5\times17+5\times7-119}{119}\\ =\dfrac{-85+35-119}{119}=\dfrac{-169}{119}\)

\(A=-5^{22}\left\{-222\left[-122-\left(100-5^{22}\right)+2022\right]\right\}\)

\(A=-5^{22}\left\{-222\left[1900-\left(100-5^{22}\right)\right]\right\}\)

\(A=-5^{22}\left[-222\left(1900-100+5^{22}\right)\right]\)

\(A=-5^{22}\left[-222\left(1800+5^{22}\right)\right]\)

\(A=-5^{22}\left(-399600-222\cdot5^{22}\right)\)

\(A=399600\cdot5^{22}+222\cdot5^{44}\)

A = 2 ( 3 + 5 ) 2 2 + 3 + 5 + 2 ( 3 − 5 ) 2 2 − 3 − 5 2 3 + 5 4 + ( 5 + 1 ) 2 + 3 − 5 4 − ( 5 − 1 ) 2 = 2 3 + 5 5 + 5 + 3 − 5 5 − 5 2 ( 3 + 5 ) ( 5 − 5 ) + ( 3 − 5 ) ( 5 + 5 ) ( 5 + 5 ) ( 5 − 5 ) = 2 15 − 3 5 + 5 5 − 5 + 15 + 3 5 − 5 5 − 5 25 − 5 = 2. 20 20 = 2 V ậ y   A = 2

a) đ

b) s

c) đ

d) đ

Đ

S

Đ

Đ

a) đ

b) s

c) đ

d) đ

1

\(\dfrac{22}{5}\) x \(\dfrac{21}{22}\) x \(\dfrac{5}{21}\)

= \(\dfrac{5}{5}\) = 1

Tick cho mik nha

1

\(\left(-\dfrac{5}{11}+\dfrac{7}{22}--\dfrac{4}{33}-\dfrac{5}{44}\right):\left(38\dfrac{1}{22}-39\dfrac{7}{22}\right)\)
\(=\left(-\dfrac{60}{132}+\dfrac{42}{132}+\dfrac{16}{132}-\dfrac{15}{132}\right):\left(\dfrac{837}{22}-\dfrac{865}{22}\right)\)
\(=-\dfrac{17}{132}\cdot\left(-\dfrac{14}{11}\right)\)
\(=\dfrac{119}{726}\)
#AvoidMe

\(=\left(\dfrac{-60}{132}+\dfrac{42}{132}+\dfrac{16}{132}-\dfrac{15}{432}\right):\left(-1-\dfrac{3}{11}\right)\)

\(=\dfrac{-17}{132}\cdot\dfrac{-11}{14}=\dfrac{17}{168}\)

=-17/132*-11/14=17/168

a,x:4/5=25/4:5/4

 x:4/5=5

      x=5.4/5

      x=4

Vậy x=4

(lưu ý:dấu . có nghĩa là dấu nhân bạn nhé)

b,22/5:x=22/30:2/5

  22/5:x=11/6

         x=22/5:11/6

         x=12/5

Vậy x=12/5

a.x:1/5=25/4:5/4

5x/4=25/4.4/5

5x/4=5

5x=20

x=4

a) x :  \(\frac{4}{5}\) = \(\frac{25}{4}\): \(\frac{5}{4}\)

    x : \(\frac{4}{5}\)   = 5

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

          x         = 4

b) \(\frac{22}{5}\): x = \(\frac{22}{30}\): \(\frac{2}{5}\)

     ​\(\frac{22}{5}\)​ : x = \(\frac{11}{10}\)

                   x = \(\frac{22}{5}\) : \(\frac{11}{10}\)

                   x =  \(\frac{22}{5}\)

Lời giải:

$=5^{22}-22+[122-(100+5^{22})+2022]$

$=5^{22}-22+122-100-5^{22}+2022$

$=(5^{22}-5^{22})+(-22+122-100)+2022$

$=0+0+2022=2022$

khoảng cách là:

7,22-5,72=1,5

có số số hạng là:

(34,22-5,72):1,5+1=20(số)

tổng là:

(34,22+5,72)x20:2=399,4

đáp số 399,4 nha bạn

27,89   nha

27,89 

-HT-

27,89 nha bạn