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一年级数学下册第2单元《20以内的退位减法》2.2《十几减8、7、6》作业新人教版.docx

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1十几减 8、7、6基础题1填空。 比 16 大、比 19 小的数是（ ）和（ ） 。18 里面有（ ）个十， （ ）个一。12 前面的数是（ ） ，17 后面的数是（ ） 。2直接写出得数。 8+5= 6+6= 139= 169= 7+4= 6+5= 6+8= 149= 9+6= 8+7= 6+7= 5+8=3在里填上“” 、 “=能力题1.12-7=52.6+9=15提升题8【解析】

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