1. D

2. D

3. A

1 Did she invite Tom to an art exhibition yesterday?

2 Three days ago, two thieves broke into the museum and stole a precious picture.

3 It took my mother one week to solve the family's issues.

4 Ricky Martin was born on December 24th, 1971 in Puerto Rico.

5 It didn't rain yesterday so my family had a picnic in the park.

6 Where did you go last summer? - We traveled to Bangkok and visited some old friends.

7 Britney Spears made a concert world tour in 2011 and it was very successful.

8 My grandfather moved to Vancouver when he was 10 years old.

1 When I got to the zoo, there weren't any tigers in the cage.

2 Last night, Kyle played the guitar very loudly so the neighbors complained about that.

1 Two days ago, Susan came home very late so everybody was worried about her.

2 We went to Bejing but we didn't see the forbidden city there.

a, \(18:3-3.\left(51:17\right)=6-3.3\)

\(=6-9=-3\)

\(b,25-200:50.4=25-4.4\)

\(=25-16=9\)

\(c,77.25+65.77+77.10=77.\left(25+65+10\right)\)

\(=77.100=7700\)

\(d,36.72+36.28-28.100=36.\left(72+28\right)-28.100\)

\(=36.100-28.100=\left(36-28\right).100\)

\(=8.100=800\)

7: likes\ dogs\ he\ and\ parrots\.                           

   ________He likes dog and parrots.___________________________           

8: many\ how\ have\ you\do\goldfish\?             

   ______________How many goldfish do you have?_____________________         

 9: he\five\plane\has\ and\a\ ships\.               

 __________He has a plane and five ships.________________________           

10: in\listening\Hoa\is\music\ the\to\room\.     

_________Hoa is listening to music in the room.__________________________       

  11:mother\My\dinner\cooking\is\.                   

____________My mom is cooking dinner.______________________             

12: a\ picture\ is\ drawing\ He\.                 

      ___________He is drawing a picture._____________________             

13: skipping \ the\ yard\the\are\ girls\in\.            _

____________________The girls are skipping in the yard.____________           

14: lot\ I\ have\ pets\ a\ of\.                               

_________I have a lot of pets.________________________           

15: are\ cage\ The\in\parrots|the\.                     

__________The parrots are in the cage.______________________           

16: goldfish\Where\are\the\?                             

_____Where are the goldfish?___________________________           

 17: fish tank\cats\ are\ The\ behind\ the\.         

______The cats are being the fish tank.___________________________           

18: Do\have\trucks\ you\any\?                       

  _____________Do you have any trucks?____________________             

19: like\ you\do\toys\What\?                           

_________What toys do you like?___________________

Gì kì vậy cậu 🙂

\(x\times25-x=25\times23+25\)

\(\Rightarrow x\times25-x=600\)

\(\Rightarrow x\times25-x\times1=600\)

\(\Rightarrow x\times\left(25-1\right)=600\)

\(\Rightarrow x\times24=600\)

\(\Rightarrow x=600:24\)

\(\Rightarrow x=25\)

Vậy x = 25

558 - (15 : x + 29) x 17 = 14 

\(\Rightarrow\left(15:x+29\right)\times17=558-14\)

\(\Rightarrow\left(15:x+29\right)\times17=544\)

\(\Rightarrow15:x+29=544:17\)

\(\Rightarrow15:x+29=32\)

\(\Rightarrow15:x=32-29\)

\(\Rightarrow15:x=3\)

\(\Rightarrow x=15:3\)

\(\Rightarrow x=5\)

Vậy x = 5

\(\left(x+40\right)\times15=75\times24\)

\(\Rightarrow\left(x+40\right)\times15=1800\)

\(\Rightarrow x+40=1800:15\)

\(\Rightarrow x+40=120\)

\(\Rightarrow x=120-40\)

\(\Rightarrow x=80\)

Vậy x = 80