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DM
7 tháng 11 2016
1. A letter is read by Peter.
2. All the books in the shop were sold.
3. The words are explained by teacher today.
4. A new restaurant will be opened next week.
5. The lessons were prepared carefully.
VN
24 tháng 4 2016
nhân chéo chia ngang
x= -7*36/12=-21
muốn chắc chắn thì thử lại
\(\frac{-7}{12}=\frac{21}{36}\)theo quy đồng cũng đúng
24 tháng 4 2016
Viết lại là:
\(\frac{-7}{12}=\frac{x}{36}\)
=> \(-7.36=12.x\)
=> \(-252=12.x\)
=> \(x=\frac{-252}{12}\)
=> \(x=-21\)
CH
1
14 tháng 8 2016
2x.(x - 5) - x.(3 + 2x) = 26
=> (2x2 - 10x) - (3x + 2x2) = 26
=> 2x2 - 10x - 3x - 2x2 = 26
=> -13x = 26
=> x = 26 : (-13)
=> x = -2
14 tháng 8 2016
2x.﴾x ‐ 5﴿ ‐ x.﴾3 + 2x﴿ = 26 => ﴾2x 2 ‐ 10x﴿ ‐ ﴾3x + 2x 2 ﴿ = 26 => 2x 2 ‐ 10x ‐ 3x ‐ 2x 2 = 26 => ‐13x = 26 => x = 26 : ﴾‐13﴿ => x = ‐2
CH
0
CH
1
1. B
2. A
3. C
4. C
5. D
6. D
7. A
8. A
9. B
10. D
1. Schools in Vietnam are different ........... schools in the USA.
A. in B. from C. for D. at
2. What time does Hanh ........ history class ?
A. have B. has C. do D. does
3. We have math ................ Tuesday morning.
A. in B. at C. on D. of
4. ............. racks have megazines and those have newspapers.
A. This B. That C. These D. There
5. You can find science books .......... the shelves here.
A. of B. at C. to D. on
6. A ....................... works in a library
A. farmer B. nurse C. doctor D. librarian
7. Mai: .............. can I find a literature book, please ? Mrs Lan: On that shelf.
A. Where B. Why C. What D. Which
8. English books are ................. the back of the library
A. at B. on C. in D. from
9. In the USA, students .................... a uniform.
A. not wearing B. don't wear C. isn't wearing
D. won't wear
10. ........................ child is my teacher's son
A. These B. Those C. There D. That