插入运算符等式成立问题设计程序在表达式“123456789 = a”中左边的适当位置插入运算符“+”“-”或“*”,以使等式成立,列出所有可能情况.例如 当a=100时,123+45-67+8-9 = 100.看清题目要求,我要
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![插入运算符等式成立问题设计程序在表达式“123456789 = a”中左边的适当位置插入运算符“+”“-”或“*”,以使等式成立,列出所有可能情况.例如 当a=100时,123+45-67+8-9 = 100.看清题目要求,我要](/uploads/image/z/6811037-53-7.jpg?t=%E6%8F%92%E5%85%A5%E8%BF%90%E7%AE%97%E7%AC%A6%E7%AD%89%E5%BC%8F%E6%88%90%E7%AB%8B%E9%97%AE%E9%A2%98%E8%AE%BE%E8%AE%A1%E7%A8%8B%E5%BA%8F%E5%9C%A8%E8%A1%A8%E8%BE%BE%E5%BC%8F%E2%80%9C123456789+%3D+a%E2%80%9D%E4%B8%AD%E5%B7%A6%E8%BE%B9%E7%9A%84%E9%80%82%E5%BD%93%E4%BD%8D%E7%BD%AE%E6%8F%92%E5%85%A5%E8%BF%90%E7%AE%97%E7%AC%A6%E2%80%9C%2B%E2%80%9D%E2%80%9C-%E2%80%9D%E6%88%96%E2%80%9C%2A%E2%80%9D%2C%E4%BB%A5%E4%BD%BF%E7%AD%89%E5%BC%8F%E6%88%90%E7%AB%8B%2C%E5%88%97%E5%87%BA%E6%89%80%E6%9C%89%E5%8F%AF%E8%83%BD%E6%83%85%E5%86%B5.%E4%BE%8B%E5%A6%82+%E5%BD%93a%3D100%E6%97%B6%2C123%2B45-67%2B8-9+%3D+100.%E7%9C%8B%E6%B8%85%E9%A2%98%E7%9B%AE%E8%A6%81%E6%B1%82%2C%E6%88%91%E8%A6%81)
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