一年级数学下册五加与减(二)3小小图书馆计算题北师大版.doc

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13 小小图书馆计算题1想想算算40(136) 30(109)536 409157 103 189357 403 9892计算下面各题634 736 505547 869 412278 303 5153括号里哪一个得数对?把对的圈起来535 (48,58) 929 (2 83)847 (83,77) 376 (21 31)参考答案1想想算算47,31,47,31,8,7,9,28,37,892计算下面各题59、67、45、47、77、39、19、27、463括号里哪一个得数对?把对的圈起来48,83,77,31

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