Tính giá trị của biểu thức:  3 4 − 1 8 + 5 − 2

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

The academic year in Vietnam is over_____  the end  ____ May.

A. from / in

B. for / on

C. on / in

D. at / of

Tính nhanh:  B = 3 99.96 − 3 96.93 − 3 93.90 − ... − 3 7.4 − 3 4