四年级数学上册第4单元《三位数乘两位数》一个因数中间有0的乘法课件1新人教版.ppt

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一个因数中间有0的乘法,都被孙悟空吃光了。,一个大仙桃也没摘到。,0+0+0+0+0+0+0=0,07=0,70=0,想一想,03=,0,00=,90=,0,0,0和任何数相乘都得0。,做一做,02=,20=,5 0=,5 + 0=,06=,60=,0 8=,0 + 8=,0,0,0,0,0,0,5,8,0和任何数相乘都得0。 0和任何数相加,还得原来的数。,0和一个数相乘与0和一个数相加有什么不同?,我每天要步行3圈,每圈508米。,500, 1500(米),5 0 8 23 1 5 2 4,508x3=,1524,(米),答:老寿星每天步行1524米。,对比练习:, ,0,1 5,我是快乐的小医生,3,5,我是快乐的小医生,1 0,我是快乐的小医生,做一做,207 8,305 9,603 4,你能很快说出下面两个算式哪个 得数大吗?,1+2+3+4+5+6+7+8+9+0 1234567890,聪明小一休,你能从“09”的数字中任意选4个数,编成三位数乘一位数的乘法算式吗?(注意:三位数的中间必须有0哟),0 1 2 3 4 5 6 7 8 9,

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