六年級(jí)上冊(cè)數(shù)學(xué)各單元重點(diǎn)歸納

1、0六六年年級(jí)級(jí)上上冊(cè)冊(cè)數(shù)數(shù)學(xué)學(xué)知知識(shí)識(shí)點(diǎn)點(diǎn)歸歸納納第一單元分?jǐn)?shù)乘法..............................................................................................................................0（一）分?jǐn)?shù)乘法意義：..................................................

2、..................................................................0（二）分?jǐn)?shù)乘法計(jì)算法則：............................................................................................................1（三）積與因數(shù)的關(guān)系：.....................

3、...........................................................................................1（四）分?jǐn)?shù)乘法混合運(yùn)算................................................................................................................1（五）倒

4、數(shù)的意義：乘積為1的兩個(gè)數(shù)互為倒數(shù)。..................................................................2（六）分?jǐn)?shù)乘法應(yīng)用題——用分?jǐn)?shù)乘法解決問(wèn)題......................................................................2第二單元位置.....................................

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

6、.............................3第三單元分?jǐn)?shù)除法..................................................................................................................................4一、分?jǐn)?shù)除法的意義：.........................................

7、.........................................................................4分?jǐn)?shù)除法是分?jǐn)?shù)乘法的逆運(yùn)算，已知兩個(gè)數(shù)的積與其中一個(gè)因數(shù)，求另一個(gè)因數(shù)的運(yùn)算。.4二、分?jǐn)?shù)除法計(jì)算法則：..............................................................................................

8、................5除以一個(gè)數(shù)（0除外），等于乘上這個(gè)數(shù)的倒數(shù)。.....................................................................5三、分?jǐn)?shù)除法混合運(yùn)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(zhǎng)：..............................................................................................................................7圍成圓的曲線的長(zhǎng)度叫做圓的周長(zhǎng)，周長(zhǎng)用字母C表示。......................................................

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

13、........................................8一、百分?jǐn)?shù)的意義：表示一個(gè)數(shù)是另一個(gè)數(shù)的百分之幾。........................................................8二、百分?jǐn)?shù)應(yīng)用題.........................................................................................

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

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

16、元、數(shù)學(xué)廣角..............................................................................................................................11一、研究中國(guó)古代的雞兔同籠問(wèn)題。......................................................................

17、....................112（三）積與因數(shù)的關(guān)系：（三）積與因數(shù)的關(guān)系：一個(gè)數(shù)（0除外）乘大于1的數(shù)，積大于這個(gè)數(shù)。一個(gè)數(shù)（0除外）乘小于1的數(shù)，積小于這個(gè)數(shù)。一個(gè)數(shù)（0除外）乘等于1的數(shù)，積等于這個(gè)數(shù)。注：在進(jìn)行因數(shù)與積的大小比較時(shí)，要注意因數(shù)為0時(shí)的特殊情況。（四）分?jǐn)?shù)乘法混合運(yùn)算（四）分?jǐn)?shù)乘法混合運(yùn)算1、分?jǐn)?shù)乘法混合運(yùn)算順序與整數(shù)相同，先乘、除后加、減，有括號(hào)的先算括號(hào)里面的，再算括號(hào)外面的。2、整數(shù)乘法運(yùn)算定律

18、對(duì)分?jǐn)?shù)乘法同樣適用；運(yùn)算定律可以使一些計(jì)算簡(jiǎn)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(gè)數(shù)互為倒數(shù)。的兩個(gè)數(shù)互為倒數(shù)。1、倒數(shù)是兩個(gè)數(shù)的關(guān)系，它們互相依存，不能單獨(dú)存在。單獨(dú)一個(gè)數(shù)不能稱為倒數(shù)。（必須說(shuō)清誰(shuí)是誰(shuí)的倒數(shù)）2、判斷兩個(gè)數(shù)是否互為倒數(shù)的唯一標(biāo)準(zhǔn)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