1996 AMC 12 第 1 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
1.
下面的加法算式不正确。要使算式正确，可以改动的最大数字是什么？
The addition below is incorrect. What is the largest digit that can be changed to make the addition correct?
小提示：
把图中写出的和与三个加数的实际总和进行比较
Compare the displayed sum with the actual sum of the three addends
大提示：
要改正确，必须使某一数位上的总和减少一个单位
The correction must lower the total by one unit in a particular place
解答：
三个加数之和为 ，比正确结果大 。把十位数字 （在 中）改为 ，总和就减少 ，变成 。题中没有更大的数字能通过改动达到这个效果，所以正确答案是 D。
The three addends total which is too large. Changing the tens digit in to lowers the sum by and gives No larger listed digit can make that change, so the correct answer is D.
其他年份的第 1 题
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