AMC 8 1997 Problem 2
AMC8 1997 年第 2 题
表达式与运算★☆☆☆☆
Ahn chooses a two-digit integer, subtracts it from 200, and doubles the result. What is the largest number Ahn can get?
Ahn 选择一个两位整数，用 200 减去它，然后将结果加倍。Ahn 能得到的最大数是多少？
- A.200
- B.202
- C.220
- D.380
- E.398
正确答案 · Correct Answer
D
解析 · Solution
Solution 1
The smallest two-digit integer he can subtract from 200 is 10. This will give the largest result for that first operation, and doubling it will keep it as the largest number possible.
200-10=190 190×2=380
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