Cà rốt , súp lơ , bắp cải , ...

Gỉa sử a+b \(\ne0\)

\(PT\Leftrightarrow\left(10a+b\right)=\left(a+b\right)^2\)

\(\Leftrightarrow a^2-2ab+b^2-10a-b=0\)

Vô nghiệm

\(a+b=0.PT=>0=0...\)

Vậy pt vô nghiệm với mọi a,b

1we ( play ) ........ARE PLAYING.... volley ball now

2I ( do ) ...AM DOING....... the homework at the moment

3She ( have ) ......HAS..... a small breakfast ever day

4Tuan usually ( play ) ......PLAYS...... soccer at recesss

5She ( go ) ...WILL GO....... to the party tomorrow

6I ( vist ) ....WILL VISIT...... my teacher next week

7Would you like ( join ) .......TO JOIN... in art club ?

8Let's ( drink ) ........DRINK.. some coffee

9what about ( go ) ...GOING....... to the zoo ?

10look! the teacher IS COMING ( come ) Here

11would you like ( watch ) ....TO WATCH...... TV ?

12Should we ( drink ) .DRINK......... something ?

13The girl ( play ) ......IS PLAYING.... tennis in the yard at the moment

14Our friends ( come ) .....IS GOING TO COME..... here tonight

15My mother never ( stay ) ......STAYS.... up late

16They ( be ) .....ARE..... in grade 7

17He ( have ) ...WILL HAVE....... meeting next week

18I ( wash ) ........WASH.. my face every morning

19Huong ( not play ) ..DOESN'T PLAY........ basketball in the morning

20What about ( take ) ....TAKING...... a break ?

21Nacy ( make ) ...IS MAKING ....... some cake at present

22Look! Mai ( tank ) .IS TALKING......... To someone

23They ( visit ) ....WILL VISIT...... Can Tho city next week

24Lan and Hoa ( not play ) .....DON'T PLAY..... soccer every day

25He learns how ( do ) .....TO DO..... experiments in Physics class

26Hoa ( do ) .DOES......... Exercise every morning

27I ( come ) ....WILL COME...... back my hometown tomorrow

28students often ( go ) ...GO....... to the cafeteria at lunchtime

29I ( do ) ......AM DOING.... some experiments now

30Nam ( go ) .IS GOING.........to school at the moment

sửa 1 là supporting nhá

1. nam is not very........SUPPORTED............ he never plays games.(sport)

2 we always need more...........PLACE...... (play)

3. you should do more to help ...........HOMELESS........ people (home)

4 what is your.......NATIONALITY....? (nation)

Rewrite the sentences:

They have never driven before.

==> This is the first time they have seen driven

The road is ... crowed for me to cross. A.so B.very C.too D.much

Everyone must ... the traffic rules when going on the road. A.do B.make C.get D.obey

andy sometimes READS.comics

we never ( watch ) ....WATCH......................tv in the morning

listen ! sandy ( sing ).....IS SINGING..................................in the bathroom

my sister usually ( help) .......helps...................in the kitchen

Drivers have to .... your seatbelt whenever they ride

A.walk B.walk on C.walk through D.walk across

ta co so đồ : 

Gạo nếp : |-----|-----|

Gạo tẻ :   |-----|-----|-----|

Sau khi ban 15kg gao nep thi1 phan tuong ung voi : 

120+15=135 kg

Luc dau co la : 

Gạp nếp : 

135.2+15=285

Gạo tẻ : 

285+120=405

****