11. oldest

Complete the sentences, using the comparison form of one of the adjectives given in the box. You may need to make any necessary changes to the adjectives.
bad comfortable crowded easy long low near old popular serious slow thin
1. You’ll find your way around the town easy if you have a good map.
2. What’s the longest river in the world?
3. I prefer this chair to the other one. That one is far more comfortable  
4. Can you tell me the way to the nearest bus station?
5. This shop isn’t very expensive. The prices are lower than some other shop.
6. You are driving too fast. Could you drive a bit slower?
7. There were a lot of people on the bus. It was crowded as usual.
8. You look thinner than before. Have you lost weight?
9. Unfortunately, her illness was more serious than we thought at first.
10. Is football the most popular sport in your country, too?
11. Tom has three sisters. His older sister is 18 years old. His youngest is 2.
12. It was an awful day. It was the worst day in my life

5 là -8 nhé, mình nhầm

Tham khảo

Trong dìu dịu mưa xuân, hoa đào phất phơ sắc hồng. Nó cũng là dấu hiệu mùa của mùa xuân đang đến. “ Xuân còn non, nghĩa là xuân sẽ già ” nhưng trong lòng tôi mùa xuân nho nhỏ ở nhà ông tôi đặc biệt là cây đào sẽ không bao giờ già đi. Nó sẽ đi cùng tôi suốt bao năm tháng còn lại.Cảm ơn tạo hóa, đã tạo ra một loài hoa đẹp. Đào sẽ mãi đẹp trong lòng người đất Việt.

4. \(A=3\sqrt{2}+4\sqrt{8}-\sqrt{18}=3\sqrt{2}+8\sqrt{2}=3\sqrt{2}=8\sqrt{2}\)

5. \(\dfrac{\sqrt{12}-\sqrt{48}-\sqrt{108}-\sqrt{192}}{2\sqrt{3}}=\dfrac{2\sqrt{3}-4\sqrt{3}-6\sqrt{3}-8\sqrt{3}}{2\sqrt{3}}=\dfrac{-16\sqrt{3}}{2\sqrt{3}}=-8\sqrt{3}\)

1. \(\dfrac{1}{2-\sqrt{6}}-\dfrac{1}{2+\sqrt{6}}=\dfrac{2+\sqrt{6}-2+\sqrt{6}}{4-6}=\dfrac{2\sqrt{6}}{-2}=-\sqrt{6}\)

2. \(\sqrt{27a}.\sqrt{3a}=\sqrt{81a^2}=9a\left(a>0\right)\)

Rewrite the sentences

1. My house is bigger than your house
-> Your house is not as big as mine
2. The black car is cheaper than the red one
-> The red car is more expensive than the black one
3. There is a sink, a tub and a shower in the bathroom.
-> The bathroom has a sink, a tub anh a shower
4. No one in the group is taller than Trung 
-> Trung is the tallest person in the group
5. Do you have a better refrigerator than this?
-> Is this the best refrigerator you have?
6. My house is the oldest one on the street.
-> No houses on the street are older than mine
7. My house has a living room, a bed room and a kitchen.
-> There is a living room, a bedroom anh a kitchen in my house
8. No one can sing more beautifully than Madonna.
-> Madonna sings the most beautifully
9. Why don't we go to the beach for a change?
-> How about going to the beach for a change?
10. They live at 83 Son Tay Street.
-> Their address is 83 Son Tay Street

VI.

1. d → strongest

2. b  → shorter

3. b  → higher

4. d  → as

5. d  → youngest

6. d  → than

VII.

1. older than

2. more expensive than

3. more difficult than

4. longer than

5. more modern

6. the youngest

7. more expensive

8. the coldest 

9. larger than

VIII.

1. c

2. c

3. a

4. c

5. b

a. ĐKXĐ: \(x\ne5\)
\(A=\dfrac{\sqrt{x^2-10x+25}}{x-5}=\dfrac{\sqrt{\left(x-5\right)^2}}{x-5}=\dfrac{\left|x-5\right|}{x-5}=\pm1\)

b. \(y=\sqrt{x^2+2x+5}=\sqrt{\left(x+1\right)^2+4}\ge\sqrt{4}\forall x\)

Dấu "=" xảy ra khi và chỉ khi \(x+1=0\Leftrightarrow x=-1\)

Vậy GTNN của y là \(\sqrt{4}\) khi \(x=-1\)

Fill in the correct form of the words in brackets (comparative or superlative)
1. My house is (big) bigger than yours.
2. This flower is (beautiful) more beautiful than that one
3. This is the (interesting) most interesting book I have ever read.
4. Non-smokers usually live (long) longer than smokers.
5. Which is the (dangerous) most dangerous animal in the world?
6. A holiday by the sea is (good) better than a holiday in the mountains
7.It is strange but often a coke is (expensive) more expensive than a beer
8. Who is the (rich) richest woman on earth?
9. The weather this summer is even (bad) worse than last summer
10. He was the (clever) cleverest thief of all.