KS3 Edexcel Computing: Interdisciplinary Integrated Question Practice | KS3 Edexcel 计算机：跨学科综合题型训练

📚 KS3 Edexcel Computing: Interdisciplinary Integrated Question Practice | KS3 Edexcel 计算机：跨学科综合题型训练

Interdisciplinary questions in KS3 Edexcel Computing blend computing concepts with other subjects you study, such as maths, science, and art. These questions test your ability to apply computational thinking in real-world contexts, reinforcing both digital skills and academic knowledge. This article provides cross-curricular practice tasks designed to build confidence and exam readiness.

KS3 Edexcel 计算机中的跨学科题目将计算概念与你所学的数学、科学和艺术等学科融合在一起。这些题目考察你在真实情境中应用计算思维的能力，同时巩固数字技能和学科知识。本文提供跨学科练习题，旨在帮助你建立信心，做好备考准备。

1. Mathematics and Binary Logic | 数学与二进制逻辑

Binary systems underpin all digital devices, and understanding them requires strong number-sense from mathematics. Typical KS3 questions ask you to convert numbers, perform binary arithmetic, and then link the process to logic gates such as AND, OR, and XOR.

二进制系统是所有数字设备的基础，理解它需要扎实的数学数感。典型的 KS3 题目会要求你转换数字、进行二进制算术运算，然后将过程与 AND、OR、XOR 等逻辑门联系起来。

Example: Represent the decimal number 189 in binary and express it as the sum of powers of two. Then add the binary values 10111₂ (23) and 11001₂ (25), showing all carry bits.

例题：将十进制数 189 表示为二进制，并用 2 的幂之和表示。然后将二进制数 10111₂ (23) 与 11001₂ (25) 相加，显示所有进位。

16 + 8 + 4 + 1 = 10111101₂. The place values from most significant to least are 2⁷ to 2⁰.

解答：189 = 128 + 32 + 16 + 8 + 4 + 1 = 10111101₂。从最高位到最低位的位权依次为 2⁷ 到 2⁰。

189₁₀ = 1×2⁷ + 0×2⁶ + 1×2⁵ + 1×2⁴ + 1×2³ + 1×2² + 0×2¹ + 1×2⁰

Now the addition: align the two binary numbers as you would in decimal addition.

现在做加法：像十进制加法那样对齐两个二进制数。

Step 1: LSB 1 + 1 = 0, carry 1.

步骤 1：最低位 1 + 1 = 0，进位 1。

Step 2: Next column 1 + 0 + carry 1 = 0, carry 1.

步骤 2：下一列 1 + 0 + 进位 1 = 0，进位 1。

Step 3: 1 + 0 + carry 1 = 0, carry 1.

步骤 3：1 + 0 + 进位 1 = 0，进位 1。

Step 4: 1 + 1 + carry 1 = 1, carry 1.

步骤 4：1 + 1 + 进位 1 = 1，进位 1。

Step 5: 0 + 1 + carry 1 = 0, carry 1. Final result with an extra bit is 110000₂ (48).

步骤 5：0 + 1 + 进位 1 = 0，进位 1。最终结果多出一位，为 110000₂ (48)。

A, B, Cin) and produces Sum = A XOR B XOR Cin and Cout = (A AND B) OR (Cin AND (A XOR B)).

在电子电路中，每一位都用全加器来建模。全加器有三个输入（A、B、进位输入），输出为 Sum = A XOR B XOR Cin 以及 Cout = (A AND B) OR (Cin AND (A XOR B))。

Complete this truth table for a half-adder and explain how it can be combined to form a full-adder.

完成下面的半加器真值表，并解释如何将其组合成全加器。

A	B	Sum (A XOR B)	Carry (A AND B)
0	0	0	0
0	1	1	0
1	0	1	0
1	1	0	1

This compact representation is key to understanding how a computer's arithmetic logic unit (ALU) performs addition at the hardware level.

这种紧凑的表示法是理解计算机算术逻辑单元在硬件层面如何执行加法的关键。

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2. Science: Sensor Data and Experiment Analysis | 科学：传感器数据与实验分析

In science experiments, computers often collect data from sensors – light, temperature, pH, or motion. KS3 computing questions may ask you to write a small program that reacts to sensor readings, linking physical variables to computational decision-making.

在科学实验中，计算机经常从传感器（光、温度、pH 值或运动传感器）收集数据。KS3 计算机题目可能会要求你编写一个小程序，根据传感器读数做出反应，将物理变量与计算决策联系起来。

Scenario: A light sensor returns a value between 0 (dark) and 100 (bright). Write pseudocode to turn on an LED when the light level drops below 25 and turn it off otherwise. Add a five-second delay between readings.

情境：一个光线传感器返回 0（暗）到 100（亮）之间的值。编写伪代码，当光线水平降至 25 以下时点亮 LED，否则关闭 LED。每次读数之间延迟五秒。

One possible solution in structured English:

一种可能的结构化英语解决方案：

REPEAT forever:

重复执行：

READ lightValue from sensor

从传感器读取 lightValue

IF lightValue < 25 THEN

如果 lightValue < 25，则

SET ledPin to HIGH

将 ledPin 设为高电平

ELSE

否则

SET ledPin to LOW

将 ledPin 设为低电平

END IF

结束条件判断

WAIT 5 seconds

等待 5 秒

This algorithm uses sequence, selection (IF-THEN-ELSE), and iteration (REPEAT), matching the 'programming' strand of KS3 computing.

该算法使用了顺序、选择（IF-THEN-ELSE）和循环（REPEAT），符合 KS3 计算机课程中“编程”部分的要求。

Extension: If the experiment also records temperature, modify the pseudocode so the LED only turns on when both light < 25 AND temperature < 15°C, demonstrating the use of a compound condition.

拓展题：如果实验还记录温度，请修改伪代码，使得只有当光线 < 25 且温度 < 15°C 时 LED 才亮起，展示复合条件的使用。

Answer: The IF statement becomes IF lightValue < 25 AND temp

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