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.   小題1: 
Write it out
You can also check a math problem by writing everything out on paper.   小題2:  Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.
 小題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 (減法)—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 (變量).   小題4:  This is the only real way to assure yourself that the answer you’ve found is correct.
Check for a reasonable answer
  小題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.

小題1:C
小題2:G
小題3:A
小題4:D
小題5:E

試題分析：
小題1:從前面的句子：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. 可知要提高成績和數(shù)學(xué)技能。選C
小題2:從前面的句子;You can also check a math problem by writing everything out on paper.可知這樣做可以讓你知道自己有什么信息，需要解決什么信息。選G
小題3:從后面的句子：Make sure your answers work by doing the opposite procedure of what your problem calls for, 說明我們可以反過來做題目。選A
小題4:從前面的句子：You may find that a variable isn’t good enough or have a problem where you have to solve for a variable (變量). 可知是在方程式中帶入變量來檢查。選D
小題5:從后面的舉例：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.可知如果結(jié)果沒有意義，說明答案有誤。選E
點評：這篇文章要求給每個段落找主題句，先瀏覽各個選項做到心中有數(shù)，在閱讀時，抓住每個段落的主旨，還要注意關(guān)鍵句。和選項進行一一配對。
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