Đổi : 

3,75 tạ = 3 tạ 75 kg

3,7 km^2 = 3 km^2 7 ha

+ \(\frac{x}{2}=\frac{y}{4}=\frac{z}{5}=\frac{x+y+z}{2+4+5}=\frac{x+y+z}{11}\Rightarrow x+y+z=\frac{11x}{2}\)

+ \(\frac{x}{2}=\frac{y}{4}=\frac{z}{5}\Rightarrow\frac{2x}{4}=\frac{y}{4}=\frac{z}{5}=\frac{2x-y+z}{4-4+5}=\frac{2x-y+z}{5}\Rightarrow2x-y+z=\frac{5x}{2}\)

\(\Rightarrow\frac{x+y+z}{2x-y+z}=\frac{11x}{2}.\frac{2}{5x}=\frac{11}{5}\)

1+1+32+21=55

Số học sinh giỏi vẽ là: 

    40 : 10 = 4 (bạn)

Số học sinh giỏi tiếng Việt là: 

   40 : 10 x 2 = 8 (bạn)

Số học sinh giỏi toán là:

   40 : 10 x 3 = 12 (bạn)

Complete the sentences with words / phrases from the: native speaker; the USA; official language; summer camp; English speaking countries; accents.

1. Last year I had a wonderfull time at a .SUMMER CAMP .. in Britain.

2. The USA, the United Kingdom and New Zealand are all .ENGLISH SPEAKING COUNTRIES..

3. Australia are .NATIVE SPEAKERS.. of English.

1 + 12 = 13

III / Sentence transformation

1. I think you should go to work by bike .
Why don’t ______YOU GO TO WORK BY BIKE_________ ?
2. What about doing morning exercises in this park?

I suggested that WE SHOULD DO MORNING EXERCISES IN THIS PARK
3. Let’s have lunch at my uncle’s house this weekend.
I suggest.........HAVING LUNCH AT MY UNCLE'S HOUSE THIS WEEKEND...........
4. The world’s energy resources are limited, so we should use them economically. (Therefore)
............THE WORLD'S ENERGY RESOURCES ARE LIMITED; THEREFORE, WE SHOULD USE THEM ECONOMICALLY..........
5. Why don’t you get him to make sure the pipes in your house ?
 I suggest _____YOU GET HIM TO MAKE SURE THE PIPES IN YOUR HOUSE______
6. We are busy . so we won’t join you now .
Since ____WE ARE BUSY, WE WON'T JOIN YOU NOW____
7. What about making posters on energy saving ?
How ______ABOUT MAKING POSTERS ON ENERGY SAVING______
8. Peter worked very hard but he didn’t get a scholarship. (However)
----PETER WORKED VERY HARD; HOWEVER, HE DIDN'T GET A SCHOLARSHIP-----
9. His wife said, “ Let’s have dinner after the theatre.”
His wife suggested ---------HAVING DINNER AFTER THE THEATRE-----------
10. “ Why don’t you repair the electric fan , Ba ?”
She suggested----BA REPAIR THE ELECTRIC FAN-----
11. He forgot his umbrella , so he got wet .
He forgot his umbrella; THEREFORE, HE GOT WET ……………
12. I have to take care of my little sister when my parents are away
I have to look …………AFTER MY LITTLE SISTER WHEN MY PARENTS ARE AWAY…………
13. His father wanted him to go abroad for further studying .
His father suggested ………HIM GO ABROAD FOR FURTHER STUDY……….
14. Don’t use baths because we use more water than showers
Baths use twice ………AS MUCH WATER AS SHOWERS………….
15. He not only works hard but also actively takes part in school activities
Not only …………DOES HE WORK HARD BUT ALSO ACTIVELY TAKES PART IN SCHOOL ACTIVITIES ………..
16. He can not only speak English but also write it well
Not only ………CAN HE SPEAK ENGLISH BUT ALSO WRITE IT WELL………..
17. His wife continued complaining about his coming home late
His wife went …………ON COMPLAINING ABOUT HIS COMING HOME LATE…………….
18. This mother always looks after her children carefully .
This mother always takes ………CARE OF HER CHILDREN CAREFULLY……………..
19. Don’t forget to switch the lights off before going outside the house.
Don’t forget to …TURN THE LIGHTS OFF BEFORE GOING OUTSIDE THE HOUSE…………..

800 sản phẩm

Bn vao google dich cho nhanh

\(x^3+4x^2+4x+1\)

\(=x^3+3x^2+x+x^2+3x+1\)

\(=x\left(x^2+3x+1\right)+\left(x^2+3x+1\right)\)

\(=\left(x+1\right)\left(x^2+3x+1\right)\)