北師版二年級數(shù)學做個乘法表課件

1、問題探究練習拓展北師大版北師大版 二年級上冊二年級上冊 第八單元第八單元 6 69 9的乘法口訣的乘法口訣綠色圃中小學教育網(wǎng)http:/綠色圃中小學教育網(wǎng)http:/設(shè)計者：劉玉華設(shè)計者：劉玉華北師版二年級數(shù)學做個乘法表3x52x78x33x79x86x73x65x89x43x37x9有關(guān)18的口訣：三六十八 二九十八還有哪些數(shù)有兩個口訣？ 乘積是12的口訣： 三四十二 二六十二 乘積是16的口訣： 四四十六 二八十六 乘積是24的口訣： 三八二十四 四六二十四 乘積是36的口訣： 四九三十六 六六三十六 12345678911x1=12x1=23x1=34x1=45x1=56x1=67x1=

2、78x1=89x1=921x2=22x2=43x2=64x2=85x2=106x2=127x2=148x2=169x2=1831x3=32x3=63x3=94x3=125x3=156x3=187x3=218x3=249x3=2741x4=42x4=83x4=124x4=165x4=206x4=247x4=288x4=329x4=3651x5=52x5=103x5=154x5=205x5=256x5=307x5=358x5=409x5=4561x6=62x6=123x6=184x6=245x6=306x6=367x6=428x6=489x6=5471x7=72x7=143x7=214x7=285

3、x7=356x7=427x7=498x7=569x7=6381x8=82x8=163x8=244x8=325x8=406x8=487x8=568x8=649x8=7291x9=92x9=183x9=274x9=365x9=456x9=547x9=638x9=729x9=81小組匯報小組匯報 12345678911x1=12x1=23x1=34x1=45x1=56x1=67x1=78x1=89x1=921x2=22x2=43x2=64x2=85x2=106x2=127x2=148x2=169x2=1831x3=32x3=63x3=94x3=125x3=156x3=187x3=218x3=249x

4、3=2741x4=42x4=83x4=124x4=165x4=206x4=247x4=288x4=329x4=3651x5=52x5=103x5=154x5=205x5=256x5=307x5=358x5=409x5=4561x6=62x6=123x6=184x6=245x6=306x6=367x6=428x6=489x6=5471x7=72x7=143x7=214x7=285x7=356x7=427x7=498x7=569x7=6381x8=82x8=163x8=244x8=325x8=406x8=487x8=568x8=649x8=7291x9=92x9=183x9=274x9=365x9

5、=456x9=547x9=638x9=729x9=81悟空在取經(jīng)路上遇到妖怪，不管三七二十一，舉起金箍棒就打。孫悟空在太上老君的煉丹爐中七七四十九天，煉成了火眼金睛。唐僧師徒經(jīng)歷了九九八十一難，取得了真經(jīng)。 12345678911x1=12x1=23x1=34x1=45x1=56x1=67x1=78x1=89x1=921x2=22x2=43x2=64x2=85x2=106x2=127x2=148x2=169x2=1831x3=32x3=63x3=94x3=125x3=156x3=187x3=218x3=249x3=2741x4=42x4=83x4=124x4=165x4=206x4=247x4

6、=288x4=329x4=3651x5=52x5=103x5=154x5=205x5=256x5=307x5=358x5=409x5=4561x6=62x6=123x6=184x6=245x6=306x6=367x6=428x6=489x6=5471x7=72x7=143x7=214x7=285x7=356x7=427x7=498x7=569x7=6381x8=82x8=163x8=244x8=325x8=406x8=487x8=568x8=649x8=7291x9=92x9=183x9=274x9=365x9=456x9=547x9=638x9=729x9=81乘法表中的每一橫行中，都有9個

7、算式。從左往右看，每一橫行上的數(shù)與幾相乘，積就比前一個積多幾。橫著看橫著看 12345678911x1=12x1=23x1=34x1=45x1=56x1=67x1=78x1=89x1=921x2=22x2=43x2=64x2=85x2=106x2=127x2=148x2=169x2=1831x3=32x3=63x3=94x3=125x3=156x3=187x3=218x3=249x3=2741x4=42x4=83x4=124x4=165x4=206x4=247x4=288x4=329x4=3651x5=52x5=103x5=154x5=205x5=256x5=307x5=358x5=409x5

8、=4561x6=62x6=123x6=184x6=245x6=306x6=367x6=428x6=489x6=5471x7=72x7=143x7=214x7=285x7=356x7=427x7=498x7=569x7=6381x8=82x8=163x8=244x8=325x8=406x8=487x8=568x8=649x8=7291x9=92x9=183x9=274x9=365x9=456x9=547x9=638x9=729x9=81乘法表中的每一列中，都有乘法表中的每一列中，都有9個算式。個算式。每一列上的數(shù)與幾相乘，積就比上一每一列上的數(shù)與幾相乘，積就比上一個積多幾。個積多幾。豎著看豎著看

9、 12345678911x1=12x1=23x1=34x1=45x1=56x1=67x1=78x1=89x1=921x2=22x2=43x2=64x2=85x2=106x2=127x2=148x2=169x2=1831x3=32x3=63x3=94x3=125x3=156x3=187x3=218x3=249x3=2741x4=42x4=83x4=124x4=165x4=206x4=247x4=288x4=329x4=3651x5=52x5=103x5=154x5=205x5=256x5=307x5=358x5=409x5=4561x6=62x6=123x6=184x6=245x6=306x6=

10、367x6=428x6=489x6=5471x7=72x7=143x7=214x7=285x7=356x7=427x7=498x7=569x7=6381x8=82x8=163x8=244x8=325x8=406x8=487x8=568x8=649x8=7291x9=92x9=183x9=274x9=365x9=456x9=547x9=638x9=729x9=81： 橫行上的數(shù)與豎列上的數(shù)相同。從從1x1開始向開始向斜下方看斜下方看 12345678911x1=12x1=23x1=34x1=45x1=56x1=67x1=78x1=89x1=921x2=22x2=43x2=64x2=85x2=10

11、6x2=127x2=148x2=169x2=1831x3=32x3=63x3=94x3=125x3=156x3=187x3=218x3=249x3=2741x4=42x4=83x4=124x4=165x4=206x4=247x4=288x4=329x4=3651x5=52x5=103x5=154x5=205x5=256x5=307x5=358x5=409x5=4561x6=62x6=123x6=184x6=245x6=306x6=367x6=428x6=489x6=5471x7=72x7=143x7=214x7=285x7=356x7=427x7=498x7=569x7=6381x8=82x8

12、=163x8=244x8=325x8=406x8=487x8=568x8=649x8=7291x9=92x9=183x9=274x9=365x9=456x9=547x9=638x9=729x9=81 12345678911x1=12x1=23x1=34x1=45x1=56x1=67x1=78x1=89x1=921x2=22x2=43x2=64x2=85x2=106x2=127x2=148x2=169x2=1831x3=32x3=63x3=94x3=125x3=156x3=187x3=218x3=249x3=2741x4=42x4=83x4=124x4=165x4=206x4=247x4=288

13、x4=329x4=3651x5=52x5=103x5=154x5=205x5=256x5=307x5=358x5=409x5=4561x6=62x6=123x6=184x6=245x6=306x6=367x6=428x6=489x6=5471x7=72x7=143x7=214x7=285x7=356x7=427x7=498x7=569x7=6381x8=82x8=163x8=244x8=325x8=406x8=487x8=568x8=649x8=7291x9=92x9=183x9=274x9=365x9=456x9=547x9=638x9=729x9=81。chn f ku ju bio 乘 法 口 訣 表 一六得六 二六十二 三六十八 五六三十 一一得一 一二得二 二二得四 一三