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zuo zuo chuang guan ji
Author(s): 
Pages: 63+31
Year: Issue:  1
Journal: School Journal of Mathematics

Keyword:  责任编辑式子四位数聪明等式答案题目算式提示可能;
Abstract: <正>快下课了,老师留给同学们一道思考题: 有数字 123456789 在它们之间的空位中填“+”或“-”(也可以不填,这时就认为相邻的数字拼成了多位数),使其运算结果等于101例如: 1+2+3+45+67-8-9=101;1+2+34+56+7-8+9=101 嘟嘟只一会儿工夫就写出了好多运算式,他可高兴了,你能写几个呢?
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