$\frac{1}{5}+\frac{x}{y}=\frac{5}{4}$

$\frac{1}{4}+\frac{?}{?}=1$
b). $\frac{9}{11}+\frac{?}{?}=1$
      

1/4hg =bao nhiêu g

III. Circle the best answer.
1. Jack, Kate and I ________________in this competition.
a. taked part b. took part c. did took part
2. She ________________in my company in 1989.
a. worked b. is worked c. workd
3. My parents ________________me money for a new computer
a. don't gave b. didn't gave c. didn't give
4. ________________ supper yesterday evening?
a. did you eat b. ate you c. did you ate
5. I ________________Spanish when I ________________ten
a. understood, be b. understood, was c. understood, were
6. My teacher ________________me a lot.
a. like b. didn't liked c. didn't like
7. Yesterday we all ________________to the cinema to watch a nice comedy
a. went b. goed c. did go
8. As a child he ________________polite, so she punished him a lot.
a. didn't be b. weren't c. wasn't
9. Last year we ______________to Italy and _____________many famous places.
a. go, visit b. goed, visited c. went, visited
10. __________she _____________this beautiful dress in London?
a. does ________buy           b. did ___________buy            c. did _________bought

I. Put the verbs in Past Simple Tense.
0. Tina ___began_____ (begin) her new diary last Monday morning.
1. Lola _____________ (ring) the doctor at midnight.
2. Thomas _____________ (play) the guitar and Sonia _____________ (sing) yesterday.
3. The two kids _____________ (make) a sandcastle in the beach this morning.
4. The monkeys _____________ (eat) some bananas in the zoo several minutes ago.
5. Joanna _____________ (change) some money at the bank last week.
6. Walter _____________ (book) some tickets for the next concert yesterday.
7. They _____________ (build) an enormous hospital in Sapa in 2020.
8. Daniel _____________ (look) after Lorena’s baby last Saturday evening.
9. My daughter _____________ (show) me her notebooks last night.
10. Derek _____________ (become) a famous writer in 2019.
11. Last week, my mother (take) ____________ me to the zoo.
12. When we (arrive) ________at the party, there (not be) _______many people there.
13. My mother (say) ______________ that she (buy) _____________me a new dress.
14. Last summer, my father (teach) ______________ me to drive.
15. I (start)______________doing charity when I (be)_____________a first year student.
16. Many rich people (donate)___________money for this volunteer program.
17. My friend (ring) _________me yesterday and (invite) __________me to his party.
18. What (you/ watch) ______________ on TV last night?
19. When my father (be) ______________ young, he (use to) ______________be the most
handsome buy in the village.
20. ______________________ (you/ go) to see the concert yesterday?

2 m vuông 9dm vuông =......dm2

vào thế kỉ XVI-XVII nước ta có những thành thị nào nổi tiếng?

$\frac{7}{5}\times x=\frac{6}{5}$
$\frac{2}{9}$ + X=1
$\frac{5}{9}$ : X=1

một máy cày cày trong ba ngày thì xong thửa ruộng,ngày thứa nhất cày được 1/7 diện tích cánh đồng,ngày thứ hai cày được gấp 3 lần ngày thứ nhất.hỏi ngày thứ ba máy cày còn phải cày tiếp bao nhiêu phần diện tích cánh đồng nữa mới xong?

$x\times \frac{2}{}+x+x\times \frac{3}{5}=10$

Tìm hai số có hiệu bằng 144, biết rằng nếu lấy số lớn chia cho số bé thì được thương là 6 và số dư là 4

Tính giá trị biểu thức
$\frac{2}{7}÷\frac{2}{3}-\frac{1}{7}$
$\frac{5}{4}$ tạ =............... kg

Viết các câu lệnh nào để có hình ngũ giác đều ?