一年级数学下册第2单元《20以内的退位减法的计算》习题课件新人教版.ppt

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20以内的退位减法的计算,1.摘苹果。(连一连),题型 1,20以内的退位减法的基本练习,2.在 里填上“”、“”或“”。 158 8 127 4 189 10,3.1672 857 1143 1347 1565 395,7,6,10,10,4,7,4.算一算,你发现了什么? 1292 1181 1575 1343 我发现:十几减几可以直接用被减数个位上的数加上( )减去减数的差。,题型 2,20以内退位减法的提高练习,1,3,2,3,3,8,6,9,10,5.填结果相同的式子。,答案不唯一,6.小熊可以怎样选物体?(连一连),

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