III.
1. often sleeps
2. always do
3. never come
4. does Johnson always get
5. Do you usually go
6. seldom cries
7. never has
Chữ bạn đẹp quá :)
IV.
1. She doesn't sleep late on weekends.
2. We don't believe in ghost.
3. Do you understand the question?

Không, bởi vì nếu làm như vậy thì nội dung câu chuyện sẽ bị thay đổi/đảo lộn

3. a ; b ; c ; e ; d
4. a, tổ tiền
b, quê mùa

5x20=100 ?? :)

Who did you go to Thailand with last year?

\(\dfrac{7}{4}=1,75\)

\(\dfrac{8}{125}=0,064\)

\(\dfrac{13}{25}=0,52\)

\(\dfrac{49}{700}=0,07\)
 

\(\dfrac{32}{16}=2\)
 

\(\dfrac{24}{32}=0,75\)

chắc mình đúng ha :)   

\(\dfrac{2}{5}+\dfrac{3}{7}\)
 

\(=\dfrac{14}{35}+\dfrac{15}{35}\)
 

\(=\dfrac{29}{35}\)

\(3+\dfrac{2}{5}\)
 

\(=\dfrac{15}{5}+\dfrac{2}{5}\)
 

\(=\dfrac{17}{5}\)

\(\dfrac{5}{7}-\dfrac{1}{6}\)
 

\(=\dfrac{30}{42}-\dfrac{7}{42}\)
 

\(=\dfrac{23}{42}\)

\(\dfrac{14}{3}-3\)

\(=\dfrac{14}{3}-\dfrac{9}{3}\)
 

\(=\dfrac{5}{3}\)

\(\dfrac{5}{6}\times\dfrac{4}{3}\)
 

\(=\dfrac{20}{18}\)  \(=\dfrac{10}{9}\)

\(5\times\dfrac{8}{15}\)
 

\(=\dfrac{40}{15}\) \(=\dfrac{8}{3}\)

\(\dfrac{4}{9}:5\)

\(=\dfrac{4}{9}\times\dfrac{1}{5}\)
 

\(=\dfrac{4}{45}\)

\(\dfrac{6}{5}:\dfrac{5}{6}\)
 

\(=\dfrac{6}{5}\times\dfrac{6}{5}\)
 

\(=\dfrac{36}{25}\)