I.

1 D

2 B

3 D

4 A

5 C

6 A

7 A

8 C

II.

1 am listening

2 Are you playing

3 am reading/is watching

4 is cooking

5 is riding

II.

1 am listening (keep silent! . DHNB thì HTTD)

2 Are you playing ( now : DHNB thì HTTD)

3 am reading/is watching ( at the moment )

4 is cooking (at the moment  DNNB thì HTTD)

5 is riding ( look)

I.

1.A

2.D

3.D

4.A

5.C

6.A

7.A

8.C

II.

1.am listening

2.Are you playing

3.am reading

4.is cooking

5.is riding

19991999.1998-19981998.1999

=0

`# \text {04th5}`

`a)`

\(7 \dfrac{3}{5} \div x = 5 \dfrac{4}{15} - 1 \dfrac{1}{6}\)

\(\Rightarrow 7 \dfrac{3}{5} \div x = \dfrac{41}{10}\)

\(\Rightarrow x = 7\dfrac{3}{5} \div \dfrac{41}{10}\)

\(\Rightarrow x = \dfrac{76}{41}\)

Vậy, $x = \dfrac{76}{41}$

`b)`

$x \times 2 \dfrac{2}{3} = 3 \dfrac{4}{8} + 6 \dfrac{5}{12}$

$\Rightarrow x \times \dfrac{2}{3} = \dfrac{119}{12}$

$\Rightarrow x = \dfrac{119}{12} \div \dfrac{2}{3}$

$\Rightarrow x = \dfrac{119}{8}$

Vậy, $x = \dfrac{119}{8}.$

[3(-2)-(-8)] . (-7)-(-2).(-5)

= 2 . (-7) - 10

= -14 - 10 = -24 

\(5+2\sqrt{6}=\sqrt{\left(\sqrt{3}+\sqrt{2}\right)^2}\)

\(6+2\sqrt{5}=\sqrt{\left(\sqrt{5}+1\right)^2}\)

\(5+2\sqrt{6}=\left(\sqrt{3}+\sqrt{2}\right)^2\)

\(6+2\sqrt{5}=\left(\sqrt{5}+1\right)^2\)

`12+2sqrt35=7+2sqrt{7.5}+5=(sqrt7+sqrt5)^2`

`9+4sqrt2=8+2.2sqrt2+1=(2sqrt2+1)^2`

`9-4sqrt2=8-2.2sqrt2+1=(2sqrt2-1)^2`

\(12+2\sqrt{35}=\left(\sqrt{7}+\sqrt{5}\right)^2\)

\(9+4\sqrt{2}=\left(2\sqrt{2}+1\right)^2\)

\(9-4\left(\sqrt{2}\right)=\left(2\sqrt{2}-1\right)^2\)

\(\left|X-15\right|=2\)

\(\orbr{\begin{cases}X-15=-2\\X-15=2\end{cases}\Leftrightarrow\orbr{\begin{cases}X=-2+15=-13\\X=2+15=17\end{cases}}}\)

VẬY X=-13 HOẶC X=17

/x-15/=2

\(\Rightarrow\)/x/=2+15

\(\Rightarrow\)/x/=17

suy ra hoặc x=17

hoặc x=-17

có sai đề ko bạn?