AMC8 2026
AMC8 2026 · Q1
AMC8 2026 · Q1. It mainly tests Arithmetic misc.
What is the value of the following expression?
$1+2-3+4+5-6+7+8-9+10+11-12$
以下表达式的值是多少?
$1+2-3+4+5-6+7+8-9+10+11-12$
(A)
18
18
(B)
21
21
(C)
24
24
(D)
27
27
(E)
30
30
Answer
Correct choice: (A)
正确答案:(A)
Solution
$1+2-3+4+5-6+7+8-9+10+11-12$ = $\boxed{18}$
$1+2-3+4+5-6+7+8-9+10+11-12 = \boxed{18}$
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