câu số2

thích truyện nào

truyện nào cũng được

a: Chiều dài là \(40:\dfrac{4}{7}=70\left(m\right)\)

Diện tích khu đất là \(40\cdot70=2800\left(m^2\right)\)

b: Diện tích trồng cam là \(2800\left(1-75\%\right)=2800\cdot0,25=700\left(m^2\right)\)

chiều dài là:

40:4x7 = 70 (m)

diện tích khu vườn là :

70x40=2800 (m)

diện tích chồng cam là:

2800-(2800.75%)=700

What should we do to keep our environment greener ?

what should we do to keep our environment greener?

a: Tổng số vé đã bán là:

8000:20%=40000(vé)

b: Số vé bán được trong ngày thứ nhất là:

\(40000\cdot\dfrac{3}{5}=24000\left(vé\right)\)

c: Số vé bán được trong ngày thứ ba chiếm:

\(1-\dfrac{3}{5}-25\%=1-0,6-0,25=0,15=15\%\)(tổng số vé)

\(\dfrac{2}{3}+\dfrac{1}{3}\cdot\left(-\dfrac{2}{3}+\dfrac{5}{6}\right):\dfrac{2}{3}\)

\(=\dfrac{2}{3}+\dfrac{1}{3}\cdot\dfrac{1}{6}:\dfrac{2}{3}\)

\(=\dfrac{2}{3}+\dfrac{1}{18}\cdot\dfrac{3}{2}\)

\(=\dfrac{2}{3}+\dfrac{1}{12}=\dfrac{9}{12}=\dfrac{3}{4}\)

3 phần 4

1. D. most intelligent
2. B. hasn’t left
3. D. although
4. C. went
5. C. but
6. C. most peaceful
7. A. comedy
8. D. and
9. B. What
10. D. Will
11. D. 7 o’clock news
12. B. England
13. D. warm
14. D. the most exciting

1. Lan is the ……………. student in my class.

A. good                      B. more intelligent   C. better                     D. most intelligent

2. My sister ………….. home for school yet.

A. didn’t leave          B. hasn’t left             C. don’t leave            D. isn’t leaving

3. My friend is good at English at school ……………. I am not.

            A. because                 B. so                           C. but                         D. although

4. My father first ………….. to Da Lat in 2010.

      A. visit                       B. go                           C. went                       D. visited

5. My sister can’t swim .................... she’s afraid of water.

            A. and                        B. because                 C. but                         D.  so 

6. Amsterdam is one of the …………… cities in the world.

A. peace                     B. peaceful                C. most peaceful       D. more peaceful 

7. ‘Why are you laughing so hard?’ ‘I am watching a.................... It’s really funny!’

          A. comedy                 B. drama                  C. news                     D. romance

8. Fruit tastes good ..................... it’s healthy for your body.

          A. but                        B.or                          C. so                           D. and      

9. ....................will your future house be? - I’m not sure. It might be in the mountains.

          A. What type           B.What                       C. Where                  D. How far

10.................... robots replace teachers in the classroom within the next ten years?

         A. Do                        B. Could                      C. Are                      D. Will

11. The …….. tells people what is happening in Viet Nam and the rest of the world.

         A. national              B. cartoon                   C. game show          D. 7 o’clock news

12. Big Ben is the most famous tower in ……….

A. Viet Nam                   B. England                  C. America              D. Australia

13. Thanh likes ……… weather because he can go swimming.

A. hot                              B. cold                       C. rainy                     D. warm

14. Disney Channel is one of …………channels for children.

A. the exciting                B. exciting                  C.  most exciting      D. the most exciting