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1.
To solve a problem, you must understand it. So, if the problem is written down, you must read it carefully. Here are three things to do to get the necessary information from reading.1. Know the meaning of all words and symbols in the problem.2. Sort the information into what is needed and is not needed.3. Determine if there is enough information to solve the problem.  相似文献   
2.
Wangqiangthoughthekneweverythingaboutdiagonalsandpolygons.Butthisquestionhadhimstumped :Howmanydiagonalsdoesa 13 gonhave ?Hereadthequestioncarefully .Itwaseasytounderstand .Hedrewapictureofa 13 gin .Hestarteddrawingdiagonalsandquicklygaveupthisapproach .Hetho…  相似文献   
3.
If a quantity x is put together with a quantity y,and there is overlap z,the result is the quantity x y-z. When you know the value of x y-z and two of the variables in it,you can find the value of the third variable by solving an equation.  相似文献   
4.
Graphing Lines     
Picturing a Relationship Between Two VariablesIn a triangle, the sum of the measures of all three angles is 180°. In a right triangle, one angle has measure 90°. Suppose the other angle measures are x and y, then x and y must add to 90°. Seven pairs of possible values of x and y are in the table below. These ordered pairs are graphed below the table.  相似文献   
5.
From the area of a square you can determine the length ofany of its sides.If the length of the side is √A.That is why√A is called the square root of A. Just as a plant rests on itsroots,a square can rest on its(positive)square root.side=√AThus if the area of a square is 400 square feet,its side has length 20cm.If the area is 13square feet,its side has length √13 feet,You can verify the latter of these with a calculator:  相似文献   
6.
Ratio     
Scale drawings,models,public utilities rates and taxes are some important applications of ratio, proportion and percentages in our daily lives.Now,let's first learn some knowledge about ratio. A ratio is a comparison of two quantities in the same units,say a and b given in a particular or- der.The ratio of a to b is written a:b.In order to have a good understanding of it,some exam- ples are followed.  相似文献   
7.
Problem solving     
Problem solving is an essential skill in both school and work.A model for it was established by the charismatic teacher and mathematician George Polya in How to solve it.This book,first published in 1945,has sold more than 1 million copies and is available in 17 languages.Using a four-step procedure for problem solving,Polya's book demonstrates how to think clearly in any field.  相似文献   
8.
《高中数学课程标准》的框架设想   总被引:11,自引:4,他引:7  
高中是九年义务教育相衔接的高一级基础教育阶段,《高中数学课程标准》(以下简称(标准》)根据时代要求,对高中数学课程进行了新的设计,在保持我国数学教育优良传统的同时,力求改变目前数学课程及其实施过程中的某些“繁,难,偏,旧”的状况。  相似文献   
9.
邢成云  刘晓玫 《数学通报》2021,(1):18-23,27
“用教材教而不是教教材”早已成为我们的口头禅,但现实的践行并不乐观,固守教材的从教者不乏其人,这种“不敢越雷池一步”的教学情结仍然难以获解.尤其是对章起始课的教学关注不够,把它混同于一般的新授课,章起始课应有的先行组织者的作用发挥乏力,缺少对整章的统筹安排,使得节与节、课与课之间出现断裂整体意识淡薄,不利于数学核心素养的落实.为此|笔者带领市名师工作室成员对章起始课进行探索,已初见成效,本文即开发的一个案例.  相似文献   
10.
1推理能力的培养是数学课程的重要目标培养具有创新意识和能力的人才是时代和社会发展的需要,也是国家强盛的需要.各门学科都应将学生创新意识和能力的培养放在重要的、核心的位置,这也是此次课程改革的一个重要目标之一.数学课程改革中有很多的变化,其中关于合  相似文献   
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