Tổng diện tích các mặt của một khối lập phương là 54 c m 2 . Tính thể tích của khối lập phương đó.

A. 27 c m 3

B. 9 c m 3

C. 81 c m 3

D. 18 c m 3

Read the passage and decide statements T (True) or F (False)

Dong Nai province is at the Eastern approach to Ho Chi Minh city. Its provincial city is Bien Hoa city. The Kinh people account for 82.8% of the total population. The ethnic minority groups are Tay, Kho Mu, Nung, Dao and Ma . This area is famous throughout the eastern part of south Vietnam for its picturesque landscapes .This is a very suitable destination ror Saigonese to make some short picnics.

Saigonese usually have short picnics in Dong Nai.

A. True

B. False

So sánh  A = 2008 2009 + 2009 2010 + 2010 2011 và  B = 2008 + 2009 + 2010 2009 + 2010 + 2011

Read the passage and decide statements T (True) or F (False)

Dong Nai province is at the Eastern approach to Ho Chi Minh city. Its provincial city is Bien Hoa city. The Kinh people account for 82.8% of the total population. The ethnic minority groups are Tay, Kho Mu, Nung, Dao and Ma . This area is famous throughout the eastern part of south Vietnam for its picturesque landscapes .This is a very suitable destination ror Saigonese to make some short picnics.

Dong Nai province is at the Western approach to Ho Chi Minh City.

A. True

B. False

Vẽ góc bẹt xOy. Trên cùng một nửa mặt phẳng bờ xy vẽ hai tia Om, On sao cho ∠xOm = 150 0  , ∠xOn = 30 0  .

a) Tính số đo góc mOn

Tìm x, biết:

c) |x-1,2| = 2,5