Phép trừ phân số
1 tính:
A)$\frac{15}{16}$ - $\frac{7}{16}$
B) $\frac{7}{4}$ - $\frac{3}{4}$
C) $\frac{9}{5}$ - $\frac{3}{5}$
D) $\frac{17}{49}$ - $\frac{12}{42}$

 88: Her outgoing character contrasts ______ with that of her sister.

A. thoroughly B. fully C. sharply D. coolly

Snow and rain ______ of nature.

A. are phenomena B. is phenomena

C. is phenomenon D. are phenomenon

John forgot ______ his ticket so he was not allowed ______ the club.

A. brought/enter B. bring/entering

C. bringing/to enter D. to bring/to enter

 ________number of boys were swimming in the lake, but I didn’t know ______ exact

number of them.

A. A/the B. The/an C. The/the D. A/an

We should participate in the movements ______ the natural environment.

A. organizing to conserve B. organized to conserve

C. organized conserving D. which organize to conserve

________, you need to achieve a score of 60% or more.

A. To pass this test B. For being passed this test

C. In order pass this test D. So that to pass this test

83: I read the contract again and again _____ avoiding making spelling mistakes.

A. in terms of B. by means of C. with a view to D. in view of

When the manager of our company retires, the deputy manager will______ that

position.

A. take over B. catch on C. stand for D. hold on

1: The old man ______ to hospital early. I think they did it too late.

A. must have taken B. should have taken

C. must have been taken D. should have been taken

The more challenging the job is, _______.

A. the more interesting he finds

B. the more he finds it interesting

C. he finds it more interesting

D. the more interesting it is to him

She asked ________so embarrassed when he saw Carole.

A. why did Mai look B. did Mai look

C. why Mai looked D. why looked

There was a___________ table in the middle of the room.

A. Japanese round beautiful wooden

B. beautiful wooden round Japanese

C. beautiful wooden Japanese round

D. beautiful round Japanese wooden

We _______ touch since we _______ school three years ago.

A. lost / have left B. have lost / leave C. have lost / left

D. were losing / had left

It was no accident that he broke my glasses. He did it _______ purpose.

A. with B. on C. by D. about

The police have begun an________ into the accident which happened this afternoon.
A. investigating B. investigatory
C. investigate D. investigation

_________flowers are usually made of plastic or silk.

A. Unreal B. False C. Artificial D. Untrue

A/An_______is an official document stating that you have passed an examination,

completed a course, or achieved some necessary qualifications.

A. certificate B. requirement C. education D. test

12: (5-2x)=2, 10.(3-1\2 :x)=(-5)².|-4|

She has made an ______ for the job as a nursery teacher because she likes children.

A. application B. applicable C. apply D. applicant

Mary hardly ever cooks, ______?

A. did she B. didn’t she C. does she D. doesn't she

Learning English isn’t so difficult, once you get ______it.

A. down to B. get off C. get on D. down with

có bao nhiêu phân số bằng phân số$\frac{125}{200}$ có mẫu số là số có 2 chữ số

Cho dãy số sau được  theo một quy luật.

2;6;18;54;...

Số thứ 6 của dãy số là:

Bạn Hoa có 2 giá sách. Số sách ở giá sách thứ nhất bằng 1/3 số sách ở giá sách thứ hai. Khi chuyển 20 cuốn sách ở giá sách thứ hai sang giá sách thứ nhất thì bạn Hoa nhận ra lúc này số sách ở giá thứ nhất bằng 3/4 số sách ở giá thứ hai. Tính số sách lúc đầu ở mỗi giá sách.