数一数与乘法完整版.ppt

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1、 数一数与乘法数一数与乘法一、数松果同学们数一数3.1.15=5或51=52.25=10或52=1035=15或53=15我们边算边整我们边算边整理吧！理吧！15=5 51=525=10 52=1035=15 53=1545=20 54=2055=25 55=2565=30 56=3075=35 57=3585=40 58=4095=45 59=45一五得五一五得五二五一十二五一十三五十五三五十五四五二十四五二十五五二十五五五二十五五六三十五六三十五七三十五五七三十五五八四十五八四十五九四十五五九四十五填一填53=1559=4551=554=2015=525=1085=4065=3045=20

2、75=3555=2552=10l 3 5 =15l 乘数 乘号 乘数 等号 积l35读作读作 3乘乘5填一填：.0510201525 30403555555555算一算一共有多少个圆环？一共有多少个圆环？（3 ）（5 ）=（15 ）（只）5x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=二、摘桃子二、摘桃子5x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=105x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5

3、x4=5x6=5x8=7x5=5x3=2x5=10205x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=1020155x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=102015355x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=1020153555x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x

4、3=2x5=102015355455x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=10201535545405x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=1020153554540255x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=102015355454025105x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x

5、6=5x8=7x5=5x3=2x5=10201535545402510355x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=1020153554540251035155x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=10201535545402510351540305x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=1020153554540251035154030

6、205x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=102015355454025103515403020455x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=10201535545402510351540302045305x2=3x5=5x7=1x5=9x5=8x5=5x5=4x5=6x5=5x9=5x4=5x6=5x8=7x5=5x3=2x5=1020153554540251035154030204530=5153=385+459155553056753695595555成人：成人：5元元学生：学生：3元元买买5张张学生票学生票 买买2张成人张成人票和票和1张学生票张学生票 买买2张成人票张成人票 今天我今天我们学会了什们学会了什么？么？小结小结 今天我们今天我们学会了乘法学会了乘法口诀，并能口诀，并能解决简单的解决简单的乘法问题。乘法问题。家庭作业1.背诵课本第十九页。2.做完配套练习。