六年級上冊數(shù)學各單元重點歸納

1、0六六年年級級上上冊冊數(shù)數(shù)學學知知識識點點歸歸納納第一單元分數(shù)乘法..............................................................................................................................0（一）分數(shù)乘法意義：..................................................

2、..................................................................0（二）分數(shù)乘法計算法則：............................................................................................................1（三）積與因數(shù)的關系：.....................

3、...........................................................................................1（四）分數(shù)乘法混合運算................................................................................................................1（五）倒

4、數(shù)的意義：乘積為1的兩個數(shù)互為倒數(shù)。..................................................................2（六）分數(shù)乘法應用題——用分數(shù)乘法解決問題......................................................................2第二單元位置.....................................

5、.....................................................................................................3原理：...................................................................................................................

6、.............................3第三單元分數(shù)除法..................................................................................................................................4一、分數(shù)除法的意義：.........................................

7、.........................................................................4分數(shù)除法是分數(shù)乘法的逆運算，已知兩個數(shù)的積與其中一個因數(shù)，求另一個因數(shù)的運算。.4二、分數(shù)除法計算法則：..............................................................................................

8、................5除以一個數(shù)（0除外），等于乘上這個數(shù)的倒數(shù)。.....................................................................5三、分數(shù)除法混合運算.....................................................................................................

9、...............5第四單元比............................................................................................................................................5第五單元圓.....................................................

10、.......................................................................................7一、圓的特征..............................................................................................................................

11、......7二、圓的周長：..............................................................................................................................7圍成圓的曲線的長度叫做圓的周長，周長用字母C表示。......................................................

12、..7三、圓的面積S=πr..........................................................................................................8第六單元、百分數(shù)............................................................................................

13、........................................8一、百分數(shù)的意義：表示一個數(shù)是另一個數(shù)的百分之幾。........................................................8二、百分數(shù)應用題.........................................................................................

14、...................................9第七單元、統(tǒng)計......................................................................................................................................11扇形統(tǒng)計圖的意義：................................

15、......................................................................................11常用統(tǒng)計圖的優(yōu)點：......................................................................................................................11第八單

16、元、數(shù)學廣角..............................................................................................................................11一、研究中國古代的雞兔同籠問題。......................................................................

17、....................112（三）積與因數(shù)的關系：（三）積與因數(shù)的關系：一個數(shù)（0除外）乘大于1的數(shù)，積大于這個數(shù)。一個數(shù)（0除外）乘小于1的數(shù)，積小于這個數(shù)。一個數(shù)（0除外）乘等于1的數(shù)，積等于這個數(shù)。注：在進行因數(shù)與積的大小比較時，要注意因數(shù)為0時的特殊情況。（四）分數(shù)乘法混合運算（四）分數(shù)乘法混合運算1、分數(shù)乘法混合運算順序與整數(shù)相同，先乘、除后加、減，有括號的先算括號里面的，再算括號外面的。2、整數(shù)乘法運算定律

18、對分數(shù)乘法同樣適用；運算定律可以使一些計算簡便。乘法交換律：ab=ba乘法結(jié)合律：(ab)c=a(bc)乘法分配律：a(bc)=abac（五）（五）倒數(shù)的意義：乘積為倒數(shù)的意義：乘積為1的兩個數(shù)互為倒數(shù)。的兩個數(shù)互為倒數(shù)。1、倒數(shù)是兩個數(shù)的關系，它們互相依存，不能單獨存在。單獨一個數(shù)不能稱為倒數(shù)。（必須說清誰是誰的倒數(shù)）2、判斷兩個數(shù)是否互為倒數(shù)的唯一標準是：兩數(shù)相乘的積是否為“1”。例如：ab=1則a、b互為倒數(shù)。3、求倒數(shù)的方法：①