Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided.   1. 

Write it out

You can also check a math problem by writing everything out on paper.   2.  Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.

 3. 

Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (减法)—to determine whether or not your answer is the correct one.

Plugging in

You may find that a variable isn’t good enough or have a problem where you have to solve for a variable (变量).   4.  This is the only real way to assure yourself that the answer you’ve found is correct.

Check for a reasonable answer

  5.  For example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point. Go back through the work on your paper to make sure all of your formulas (公式) and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you’ve got on the first try.

A．Do the opposite

B．Correct the answers

C．Therefore you’ll improve your grades, as well as your math skills.

D．Plug the variable in the equation (方程) to check it out.

E. If the result of a problem seems to make no sense, it indicates that the answer is incorrect.

F. It also helps you to figure out everything after you have already finished the test.

G. This helps you to know what information you have and what information you need to solve.

This morning I went to a nearby food store to buy some breads. After the man in the store packing the bread in a small bag for me, I began to walk home with bag in my hand. On the way I met my next-door neighbor, Miss Wang, that was walking her dog .We greeted with each other and begin to talk about the weather. As we were talking, his dog came up at the bag in my hand though the bread gave off a delicious smell. As a result, some of the bread fell to the ground or the dog began to enjoy it. Five minutes late, I was back at the store to buy bread again.

书面表达（满分25分）

假定你校正在开展“根除陋习、创建文明校园”活动。请你以此为主题用英语写一篇发言稿，向全校学生倡议：

根除：乱扔垃圾、浪费食物、吸烟……

提倡：讲礼貌、互助……

注意：

词数100左右；

可以适当增加细节，以使行文连贯；

开头和结尾已为你写好，不计入总词数。

Dear friends,

As is known to all, our school has launched a campaign against had habits in order to build a civilized campus.____________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

____________________________________________

That’s all. Thank you.

Li Hua

— Don’t you think learning English wastes much time?

— ____. You haven’t got a proper method, I suppose.

A．I hope not         B．Oh, I cant’t afford it                     C．Not likely   D．Exactly

Don’t use your cellphone — we are flying at ____ altitude of 10,000 meters and ____average speech is 678km/h.

A．an; the           B．the; the           C．the; an           D．an; an

— You look pale. Did you sleep well？

— No. It was already midnight ____ I finished my homework.

A．before           B．when             C．that              D．since

How lucky he was! He ____ involved in the murder.

A．must have been     B．can have been      C．could have been    D．would have been

Facing the stress of employment, some college graduates make a popular choice ____ they will join the army.

A．which            B．that              C．what             D．where

— I’m afraid that I may miss her at the airport.

— Don’t worry. She ______ a bunch of flowers at that time.

A．holds             B．will be holding      C．was holding        D．held

Lily, my partner, is usually friendly to others, but she___ get into bad temper sometimes.

A．must             B．should            C．may              D．can