北师版二年级数学做个乘法表课件

1、问题探究练习拓展北师大版北师大版 二年级上册二年级上册 第八单元第八单元 6 69 9的乘法口诀的乘法口诀绿色圃中小学教育网http:/绿色圃中小学教育网http:/设计者：刘玉华设计者：刘玉华北师版二年级数学做个乘法表3x52x78x33x79x86x73x65x89x43x37x9有关18的口诀：三六十八 二九十八还有哪些数有两个口诀？ 乘积是12的口诀： 三四十二 二六十二 乘积是16的口诀： 四四十六 二八十六 乘积是24的口诀： 三八二十四 四六二十四 乘积是36的口诀： 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小组汇报小组汇报 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悟空在取经路上遇到妖怪，不管三七二十一，举起金箍棒就打。孙悟空在太上老君的炼丹炉中七七四十九天，炼成了火眼金睛。唐僧师徒经历了九九八十一难，取得了真经。 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乘法表中的每一横行中，都有9个

7、算式。从左往右看，每一横行上的数与几相乘，积就比前一个积多几。横着看横着看 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个算式。个算式。每一列上的数与几相乘，积就比上一每一列上的数与几相乘，积就比上一个积多几。个积多几。竖着看竖着看

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： 横行上的数与竖列上的数相同。从从1x1开始向开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 诀 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