a,8,25 + 4,5 ×2,1

= 8,25 + 9,45

= 17,7

b,263,24 : [31,16 + 34,65] − 0,71

= 263,24 : 65,81 − 0,71

= 4 − 0,71

= 3,29

c, [51,24 − 8,2] : 26,9 : 5

= 43,04 : 26,9 : 5

= 1,6 : 5

= 0,32

cái này gọi là đăng câu hỏi nhé

độ dài góc vuông còn lại là :

64 x 2 : 8 = 16 (cm )

Đ/s : 16 cm

It’s not .......\(difficult\)...............to answer this question. (difficult)

15. The film is so ............\(boring\)............that I am ………\(bored\)……..……to death to see it again. (bore)

Taylor Swift is a famous __\(singer\)____. Her songs are really popular with the young.

I really enjoy playing football at the \(weekends\).

I don't know _\(how\)_ to use this machine. It's too complex!

Many students in our school often study_ \(in\) _the library after classes.