Lời giải:
$22+23-25+27-29+31-33$

$=22+(23-25)+(27-29)+(31-33)$

$=22+(-2)+(-2)+(-2)=22+(-2).3=22-6=16$

Bài 1:

a) \(\dfrac{4}{5}-\dfrac{7}{6}+\dfrac{-6}{15}=\dfrac{24}{30}-\dfrac{35}{30}+\dfrac{-12}{30}=\dfrac{24-35+-12}{30}=\dfrac{-23}{30}\) 

b) \(\dfrac{-5}{9}.\dfrac{7}{13}+\dfrac{6}{13}.\dfrac{-5}{9}+3\dfrac{7}{9}\) 

\(=\dfrac{-5}{9}.\left(\dfrac{7}{13}+\dfrac{6}{13}\right)+\dfrac{34}{9}\) 

\(=\dfrac{-5}{9}.1+\dfrac{34}{9}\) 

\(=\dfrac{-5}{9}+\dfrac{34}{9}\) 

\(=\dfrac{29}{9}\) 

c) \(6\dfrac{3}{8}-\left(4\dfrac{3}{8}-\dfrac{1}{2}\right)=\dfrac{51}{8}-\dfrac{35}{8}+\dfrac{1}{2}=\left(\dfrac{51}{8}-\dfrac{35}{8}\right)+\dfrac{1}{2}=2+\dfrac{1}{2}=\dfrac{5}{2}\) 

d) \(2\dfrac{1}{3}.1,5-\left(\dfrac{11}{10}+50\%\right):\dfrac{4}{15}\) 

\(=\dfrac{7}{3}.1,5-\dfrac{8}{5}:\dfrac{4}{15}\) 

\(=\dfrac{7}{2}-6\) 

\(=\dfrac{-5}{2}=-2,5\) 

Bài 2:

a) \(\dfrac{3}{2}+x=\dfrac{-5}{3}\) 

           \(x=\dfrac{-5}{3}-\dfrac{3}{2}\) 

           \(x=\dfrac{-19}{6}\) 

b) \(5\dfrac{2}{3}-\left(\dfrac{3}{2}+x\right)=4\dfrac{1}{3}\) 

                   \(\dfrac{3}{2}+x=\dfrac{17}{3}-\dfrac{13}{3}\) 

                   \(\dfrac{3}{2}+x=\dfrac{4}{3}\) 

                          \(x=\dfrac{4}{3}-\dfrac{3}{2}\) 

                          \(x=\dfrac{-1}{6}\) 

b) \(\left|x-\dfrac{1}{2}\right|+75\%=\dfrac{9}{10}\) 

               \(\left|x-\dfrac{1}{2}\right|=\dfrac{9}{10}-75\%\) 

               \(\left|x-\dfrac{1}{2}\right|=\dfrac{3}{20}\) 

\(\Rightarrow\left[{}\begin{matrix}x-\dfrac{1}{2}=\dfrac{3}{20}\\x-\dfrac{1}{2}=\dfrac{-3}{20}\end{matrix}\right.\) 

\(\Rightarrow\left[{}\begin{matrix}x=\dfrac{13}{20}\\x=\dfrac{7}{20}\end{matrix}\right.\)

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#Songminhnguyệt

She thanks me for inviting her to the party.

Why's Mr.Grim sitting in a boat and fishing?

Do your classmates do their homework in the library?

Kate is going to tell her younger sister about her trip to Japan.

My sister loves taking care of small animals.

She thanks me for inviting her to the party.

Why's Mr. Grim interested in sitting in a boat and fishing?

Do your classmates do their homework in the library?

Kate is going to tell her younger sister about her trip to Japan
My sister loves taking care of small animals

d - b

D-B

D

B

C - A - C

C

A

C

c-a-c

C - C - B - D - A - B - A - B - A  - B