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二年级数学下册五《加与减》回收废电池同步练习2北师大版.doc

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1回收废电池 一、练一练。486= 36080= 1500700= 3058= 57060= 3200800=614= 40030= 25003000=二、用竖式计算。162234 718120 456307 271436 169602 98320267385 513487 56109三、沙场练兵（1）一班和二班一共回收多少节？（2）一班和三班一共回收多少节？（3）二班和三班一共回收多少节？参考答案：一、练一练。486=54 36080= 28021500700=2200 3058=88 57060=630 3200800=2400614=57 40030=370 25003000=二、用竖式计算。162234=396 718120 =838456307 =763 271436 =707169602 = 771 98320 =418267385 = 652 513487 =100056109 =165三、沙场练兵（1）199（2）23（3）2263

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