Tính giá trị biểu thức: 22,4 x 8 - 43,2

Phép tính nhân nhẩm 15,276 x 100 có kết quả là

A. 152,276

B. 1527

C. 1527,6

D. 0,15276

Trong mặt phẳng tọa độ Oxy, cho  u → = − 1 ; x ,   v → = 2 ; 4   . Hai vectơ này có độ dài bằng nhau khi và chỉ khi

A. x = 19

B.  x = - 19

C. x = 21

D. x ∈ − 19 ;   19

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks.

       Children in the Netherlands must be at least four years old to (1)_______ primary education. Almost all 4-year-olds (99.3%) in the country indeed attend primary school, (2)________ this is not compulsory until children reach the age of. Primary school is free of charge. In most schools, children are grouped by age in mixed ability classes, with one teacher for all subjects. Primary school consists of 8 groups, thus schooling (3)_______ for 8 years. During the first two years, which is also called kindergarten, children receive an average of 22 hours of (4)______, during the last 6 years children receive an average of 25 hours per week. Schools are open 5 days a week, but children are free on Wednesday afternoon. At the end of primary school, or in group 8, schools advice on secondary school choice. Most schools use a national test to support this advice, for instance the ′Citotoets’, a test (5)_______ by the Central Institute for Test development.

Question 4. 

A. educate

B. educative

C. educator

D. education