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Vì 30% số thứ nhất = 20% số thứ hai nên số thứ nhất =2/3 lần số thứ 2
Số thứ nhất là
280/(3+2)x2=112
Số thứ hai là
280-112=168
VẬy............................................................................................
Trả lời:
I. Circle the odd one.
| 1. b | 2. a | 3. d | 4. d | 5. b |
|---|
II. Look and write.
| 1. wasn’t | 2. weren’t | 3. weren’t | 4. was | 5. were | 6. wasn’t |
|---|
III/ Write.
1. They had pizza for lunch last Friday.
2. The boys had a party last weekend.
3. He didn’t have guitar lesson yesterday.
4. The girls had a picnic last Saturday.
IV/ Give the correct form of the verbs in brackets.
1. My class doesn’t start at 8’clock.
2. How many floors does your house have ?
3. Mr. Ba watches TV every evening.
4. When does Hoa have Math?
5. She brushes her teeth after meals.
6. How do you go to school? – By bike.
7. They play games after school.
8. Huy’s brother goes to bed at 10 o’clock.
9. Lam’s mother works in a factory.
10. Who do your grandparents live with?
V/ Write the correct words.
This is a nice park. There are two (1) trees in the park and there are lots of flowers.
A woman is standing near a (2) fountain.
A duck is walking on the (3) grass and a girl is walking on the (4) path.
A man is cleaning the park. He is taking all the (5) litter and putting it in the (6) garbage can.
The park is very clean now.
\(1+\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+.........+\frac{1}{x\left(x+1\right):2}=1\frac{2017}{2019}\)
\(\Leftrightarrow\frac{1}{3}+\frac{1}{6}+\frac{1}{10}+......+\frac{1}{x\left(x+1\right):2}=\frac{2017}{2019}\)
\(\Leftrightarrow\frac{2}{6}+\frac{2}{12}+\frac{2}{20}+..........+\frac{2}{x\left(x+1\right)}=\frac{2017}{2019}\)
\(\Leftrightarrow2.\left[\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+........+\frac{1}{x\left(x+1\right)}\right]=\frac{2017}{2019}\)
\(\Leftrightarrow\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+.......+\frac{1}{x\left(x+1\right)}=\frac{2017}{4038}\)
\(\Leftrightarrow\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+\frac{1}{4}-\frac{1}{5}+............+\frac{1}{x}-\frac{1}{x+1}=\frac{2017}{4038}\)
\(\Leftrightarrow\frac{1}{2}-\frac{1}{x+1}=\frac{2017}{4038}\)
\(\Leftrightarrow\frac{1}{x+1}=\frac{1}{2019}\)
\(\Leftrightarrow x+1=2019\)
\(\Leftrightarrow x=2018\)
Vậy \(x=2018\)
Trả lời:
II.
| 1. B | 2. E | 3. D | 4. A | 5. F |
|---|
III.
| 1. plane | 2. river | 3. boats | 4. markets | 5. fine |
|---|
IV.
| 1. plane | 2. hotel | 3. river | 4. mountain | 5. island |
|---|
V.
1. Da Nang is more exciting than Ho Chi Minh City.
2. Can Tho is quieter than Da Lat.
3. New York is more modern than Tokyo.
4. Which one is larger, Paris or London?
5. Which place is more beautiful, Nha Trang or Ha Long City?
Trả lời:
I. Choose the word whose underlined part is pronounced differently.
1. D 2. B 3. C 4. A 5. B 6. C
II. Choose the option that best fits each of the blanks.
1. B 2. C 3. B 4. A 5. B 6. C 7. A 8. C 9. A 10. B
III. Give the correct form of the verbs in brackets. 1. speaks
2. Do you live
3. is watching
4. slow
IV. Reorder the given words to make sentences.
1. We are in class 6A.
2. My brother is playing soccer.
3. Are there any trees behind the house?
4. He doesn’t go to school by motorbike.
IV. Read the text below and decide if the sentences are True (T) or False (F).
1. T ; 2. F ; 3. T ; 4. F
Trả lời:
I. Choose the word whose underlined part is pronounced differently.
1 - D; 2 - B; 3 - C; 4 - A; 5 - B; 6 - C;
II. Choose the option that best fits each of the blanks.
1 - B; 2 - C; 3 - B; 4 - A; 5 - B;
6 - C; 7 - A; 8 - C; 9 - A; 10 - B;
III. Give the correct form of the verbs in brackets.
1. She (speak) speaks English in class.
2. Do you (live) live in the country or in the city?
3. Nam (watch) is watching television now.
4. Nam and I are at school.
5.He is not a doctor.
6. There are four people in my family.
IV. Reorder the given words to make sentences.
1. We are in class 6A.
2. My brother is playing soccer.
3. Are there any trees behind the house?
4. He doesn’t go to school by motorbike.
V. Read the text below and decide if the sentences are True (T) or False (F).
1 - True; 2 - False; 3 - True; 4 - False;
VI. Write the opposite words in the blanks.
| 1. white | 6. thin |
| 2. short | 7. hot |
| 3. light | 8. full |
| 4. short | 9. big |
| 5. weak | 10. new (young) |
VII. Make questions for the underlined words.
1. How does your sister feel?
2. Where are they going?
3. What color are her eyes?
4. How much is this bar of soap?
5. What would you ?
I. Look and read. Put the correct word in each line.
| 0. walk | 1. rainy | 2. buildings | 3. house | 4. helmet |
|---|
II. Read and k True (T) or False (F)
| 0. T | 1. T | 2. F | 3. F | 4. T |
|---|
III. Read and do the task. There is an example.
| 0. astronaut | 1. zebra crossing | 2. tortoise | 3. listening | 4. bicycle |
|---|
IV. Choose the correct words/ phrases and write.
0. (In) Ha Noi
1. (In) Bac Ninh Province.
3. (About) Sixty kilometres./ (About) 60km.
4. By bus
5. Yes, he does.
V. Write about the seasons and weather in your place, using the questions.
0. I live in + Place .
1. There are four seasons (two seasons). They are + names of the seasons.
2. My favourite season is + name of the favourite season.
3. It is usually + adjective of weather.
4. I (always/ usually/ often/ some times) + activities
I-
1.rainy
2.buildings
3.house
4.helmet
II-
1.T
2.F
3.F
4.T
III-
1.In Bac Ninh province
2.It's about 60km from Ha Noi.
3.By bus
4.Yes,he does
IV-
1.A
2.A
3.C
4.A
v-
1.There are 4: spring,summer,autumn,winter
2.My favourite season is summer.
3.It's quite hot but interesting
4.I often go swimming on the beach or swimming poor.
Chúc bạn học tốt!
Trả lời:
1. Circle the odd one out.
1. Season
2. There
3. Song
4. Play
5. Spring
2. Select and circle A, B, C or D.
1. B; 2. B; 3. A; 4. B; 5. B;
3. Read the passage and answer the questions.
1. Fals;e 2. False; 3. True; 4. True; 5. False;
4. Reorder the words to make sentences.
1. What’s the weather in spring?
2. Minh isn’t going to Hoi An next week.
3. How far is it from here to your house?
4. Go straight ahead and turn right.
5. Where is the swimming pool?
I. Circle the odd one out.
1. A. autumn B. winter C. summer D. season
2. A. who B. what C. there D. when
3. A. danced B. song C. stayed D. listened
4. A. football B. play C. volleyball D. badminton
5. A. doing B. watching C. spring D. reading
II. Select and circle A, B, C or D.
1. What do you usually do ______ spring?
A. on B. by
C. at D.in
2. There ______ a lot of flowers at the festival last week.
A. are B. were
C. was D. is
3. ______ did they do yesterday?
A. What B. When
C. Where D. Who
4. ______ you going to Nha Trang next week?
A. Is B. Are
C. Do D. Did
5. Peter doesn’t want ______ football.
A. play B. played
C. to play D. to play
III. Read the passage and answer the questions.
Linda is from England. There are four seasons in her country. In summer, it is hot. She often goes swimming. In autumn, it is cool and wet. Her father and she sometimes go fishing. It is very cold in winter. They usually go skiing in the mountains. In spring, it is warm and beautiful. They often go camping in the national park.
T F
1. Linda isn’t from England. F
2. There are five seasons in her country. F
3. Her father and she sometimes go fishing. T
4. They usually go skiing in the mountains. T
5. In spring, it is cool and beautiful. F
IV. Reorder the words to make sentence.
1. in / spring / What / / is / the / weather / ?
→ What is the weather in spring ?
2. isn’t / going / to / Hoi An / Minh / next / week / .
→ Minh isn't going to Hoi An next week.
3. is / it / here / your / house / How far / from / to / ?
→ How far is it from here to your house ?
4. straight / Go / turn / and / ahead / right / .
→ Go straight ahead and turn right.
5. the / swimming pool / is / Where / ?
→ Where is the swimming pool ?
Hình bạn tự vẽ nhé
a. Xét hai tam giác vuông MND và tam giác vuông HND có
góc NMD = góc NHD = 90độ
cạnh ND chung
góc MND = góc HND [ vì ND là pg góc N ]
Do đó ; tam giác MND = tam giác HND [ cạnh huyền - góc nhọn ]
\(\Rightarrow\) MD = HD
b. Theo câu a ; tam giác MND = tam giác HND
\(\Rightarrow\)góc MDN = góc HDN
HỌC TỐT
a,xét hai tam giác :tam giác NDM và tam giác NDH
có :ND là cạnh chung
góc N1=góc N2
Do đó tam giác NDM=tam giác NDH (cạnh huyền -góc nhọn)
b,Theo câu a,tam giác NDM=tam giác NDH
=> Góc MDN=góc HDN
\(A=\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{50^2}\)
Ta có : \(\frac{1}{2^2}=\frac{1}{2\cdot2}< \frac{1}{1\cdot2}\)
\(\frac{1}{3^2}=\frac{1}{3\cdot3}< \frac{1}{2\cdot3}\)
\(\frac{1}{4^2}=\frac{1}{4\cdot4}< \frac{1}{3\cdot4}\)
\(...\)
\(\frac{1}{50^2}=\frac{1}{50\cdot50}< \frac{1}{49\cdot50}\)
=> \(A=\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{50^2}< \frac{1}{1\cdot2}+\frac{1}{2\cdot3}+\frac{1}{3\cdot4}+...+\frac{1}{49\cdot50}\)
=> \(A< \frac{1}{1}-\frac{1}{2}+\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{4}+...+\frac{1}{49}-\frac{1}{50}\)
=> \(A< 1-\frac{1}{50}=\frac{49}{50}\)( 1 )
Lại có : \(\frac{49}{50}< 1\)( 2 )
Từ ( 1 ) và ( 2 ) => \(A< \frac{49}{50}< 1\)
=> \(A< 1\)
Làm
Kinh tế phát triển có nhiều công trình xây dựng ,những nhà máy được xây dựng lên. Điều đó đã dẫn đến khói bao phủ bầu trời . Làm ô nhiễm môi trường Hiện nay môi trường , tài nguyên đang bị ô nhiễm và khai thác bất hợp lý . Điều đó đã dẫn đến những hậu quả xấu cho con người chúng ta như lũ lụt , hạn hán ... . Môi trường hiện nay đang rất ô nhiễm . Những con người không có ý thức tốt ... họ chỉ biết thải rác ra môi trường nhưng không biết đến hậu quả của nó . Hàng năm những chú cá voi không bị bệnh gì cũng chết. Lý do là do con người chúng ta. Khi đi biển xonh . Họ uống những chai nước xong . Xong họ vứt những chai nước xuống biển hay vứt rác bừa bãi khắp biển . Hàng năm đã có rất nhiều bãi biển đẹp trở thành bãi biển rác . Ý thức con người nói lên vấn đề môi trường hiện nay .
Con người cần phải có ý thức . Chỉ cần một chút ý thức của con người thôi cũng có thể góp phần bảo vệ môi trường. Chỉ cần mỗi người vứt rác đúng nơi quy định thì nhất định trái đất sẽ mãi là tráu đất sanh , sạch , đẹp . Còn nếu con người không có ý thức thì từ trái đất sanh , xạch , đẹp sẽ thành một trái đất rác.Bảo vệ môi chững cũng như bảo vệ chúng ta vậy . Vì vậy " Hãy bảo vệ môi trường "
HỌC TỐT