2023 AMC amc8 真题 答案 详解

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中英双语真题

2023 AMC8 Test 2023 American Mathematics Competitions 8 Problem 1 What is the value of below expression? 下面表达式的值是多少？ ((8 \times 4 + 2) - (8 + 4 \times 2)) (A) 0 (B) 6 (C) 10 (D) 18 (E) 24 Problem 2 A square piece of paper is folded twice into four equal quarters, as shown below, then cut along the dashed line. When unfolded, the paper will match which of the following figures? 如下图所示，将一张正方形纸对折两次，变成四等分，然后沿虚线裁剪。问这张纸展开后会是下面哪个图形？ (A) (B) (C) (D) (E)

英文真题

2023 AMC 8 Problems
1. What is the value of ( (8 \times 4 + 2) - (8 + 4 \times 2) )?

(A) 0 (B) 6 (C) 10 (D) 18 (E) 24

1. A square piece of paper is folded twice into four equal quarters, as shown below, then cut along the dashed line. When unfolded, the paper will match which of the following figures?

(A) (B) (C) (D) (E)

1. Wind chill is a measure of how cold people feel when exposed to wind outside. A good estimate for wind chill can be found using this calculation:

[ (\text{wind chill}) = (\text{air temperature}) - 0.7 \times (\text{wind speed}), ]

where temperature is measured in degrees Fahrenheit (°F) and wind speed is measured in miles per hour (mph). Suppose the air temperature is 36°F and the wind speed is 18 mph. Which of the following is closest to the approximate wind chill?

(A) 18 (B) 23 (C) 28 (D) 32 (E) 35

真题文字详解(英文)

Problem 1 What is the value of $(8 \times 4 + 2)-(8+4 \times 2)$?
(A) 0 (B) 6 (C) 10 (D) 18 (E) 24

Solution 1 By the order of operations, we have
$(8 \times 4 + 2)-(8+4 \times 2)=(32+2)-(8+8)=34-16=\boxed{(D) 18}.$

~apex304, TaeKim, MRENTHUSIASM

Solution 2 We can simplify the expression above in another way:
$(8 \times 4 + 2)-(8+4 \times 2)=8 \times 4 + 2 - 8 - 4 \times 2=32+2-8-8=34-16=\boxed{(D) 18}.$

Problem 2 A square piece of paper is folded twice into four equal quarters, as shown below, then cut along the dashed line. When unfolded, the paper will match which of the following figures?

真题文字详解(中英双语)

Problem 1 What is the value of $(8\times4+2)-(8+4\times2)$? $(8\times4+2)-(8+4\times2)$ 的值是多少?
(A) 0 (B) 6 (C) 10 (D) 18 (E) 24

Solution 1 By the order of operations, we have
$(8\times4+2)-(8+4\times2)=(32+2)-(8+8)=34-16=\boxed{(D) 18}.$
~apex304, TaeKim, MRENTHUSIASM
根据运算顺序，我们有 ~apex304, TaeKim, MRENTHUSIASM

Solution 2 We can simplify the expression above in another way:
我们可以用另一种方式简化上面的表达式：
$(8\times4+2)-(8+4\times2)=8\times4+2-8-4\times2=32+2-8-8=34-16=\boxed{(D) 18}.$

Problem 2 A square piece of paper is folded twice into four equal quarters, as shown below, then cut along the dashed line. When unfolded, the paper will match which of the following figures?
一张正方形纸片对折两次成四个相等的部分，如下所示，然后沿着虚线剪开。当展开时，纸片将与以下哪个图形相匹配？