AMC 8 2017 Problem 1
AMC8 2017 年第 1 题
表达式与运算★☆☆☆☆
Which of the following values is largest?
下面哪个值是最大的？
- A.2+0+1+7
- B.2×0 +1+7
- C.2+0×1 + 7
- D.2+0+1×7
- E.2×0×1×7
正确答案 · Correct Answer
A
解析 · Solution
Solution 1
We will compute each expression. A) 2 + 0 + 1 + 7 = 10 B) 2×0 + 1 + 7 = 8 C) 2 + 0×1 + 7 = 9 D) 2 + 0 + 1×7 = 9 E) Ordering these, we get 10, 8, 9, 9, 0. Out of these, 10 is the largest number and option (A) adds up to 10. Therefore, the answer is 2+0+1+7. - SBose
We immediately see that every one of the choices, except for A and D, has a number multiplied by 0. This will only make the expression's value smaller. We are left with A and D, but in D, 1 is multiplied by 7 to get 7, whereas in answer choice A, we get 8 out of 7 and 1, instead of 7. Therefore, 2+0+1+7 is your answer. https:
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