一年级数学下册第7章大海边—100以内数的加减法(二)7.1两位数加两位数笔算(不进位)课件青岛版六三制.ppt

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从图中,你知道了哪些数学信息?根据这些信息,你能提出什么数学问题?,26 + 12 = (只),20 + 10 = 30,6 + 2 = 8,30 + 8 = 38,38,一共捉了多少只 ?,26 + 10 = 36,36 + 2 = 38,26 + 12 = (只),38,一共捉了多少只 ?,2 6,3,8,38,一共捉了多少只 ?,可以用竖式计算,试试看。,1 1,3,4,11 + 23 = (只),34,一共捉了多少只 ?,回顾刚才的计算过程,想一想,用竖式计算应该注意什么?,用竖式计算,相同数位要对齐。,2 6,3,8,1 1,3,4,1.,6,2.,8,6,8,7,6,8,9,3.连一连。,4.填一填。,39,88,58,59,99,这节课我学会了什么?快来说一说吧!,作业,请完成教材第6667页自主练习第五第九题。,xx小学 x年级x班,xxx,

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