Dịch giùm bài này với

People all over the world use kilograms, centimeters, square meters, liters, and Celsius. These are all ways to  measure things. They are all part ofthe metric system.

During the French Revolution against the king, the revolutionary government started the metric system . Before that, every part of France had a different system for measuring things . Also, cloth makers measured cloth eith one sustem. Jewalers used another system.

Cho hai số tự nhiên x và y thỏa mãn 2\(^{x+1}\). 3\(^y\) = 12\(^x\)

Khi đó x + y = ...

Làm giùm =))

In what countries are umbrellas not very useful?

How do you know that the Chinese had umbrellas in the 11th century?

Why is it easier to carry an umbrella that fold up ? 

Underline the word that does not belong 

1. around, about, nearly, behind

2. movie theater, art museum, gymnasium, science museum

3. governor, collector, traveler, sailor

4. jungle, navy, forest, trees

5. game, team, win, adventure 

6. dozen, eighteen, kilo, eleven

7. hook, button, flexible, zipper

8. slide, receive, take, accept

9. lead, gold, coal, silver

10. princes, kings, queens, princess 
làm giùm =))

\(1\frac{1}{2}\)= \(\frac{3}{2}\)

Hiệu số phần bằng nhau : 3 - 2 = 1

a = 8 : 1 x 3 = 24

b = 8 : 1 x 2 = 16