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二年级数学下册五《加与减》买电器练习北师大版.doc

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1第一节 买电器1口算。100200 500 300 6004009070 8040 1203030005000 70002000 80080002看大象表演。 （在 O 里填上“” “ 6.(1) 5007001200(桑) 1200(2)800200600(朵) 600(3)多进 B 种花，少进 C 种花。(4)略7. 9508001750（人） 1750 950800150（人） 1508. 30 个9.(1)12002801480(元) (2)1200800400(元)(3)8002801080(元) (4)略10. 200250150(张) 150200350(张)答：这个工厂共生产了 350 张课桌。

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