Paper 22 Q1IGCSE 0580 May/June 2023

Question

1 Find the temperature that is 8 °C colder than -5 °C.

This question tests your ability to work with negative numbers and temperature changes. Understanding how to subtract from negative numbers is essential for many areas of mathematics.

Step-by-Step Solution

Key Takeaway

When finding a temperature that is colder than a negative temperature, subtract the temperature difference from the original negative value.

Common Mistakes

Adding 8 instead of subtracting, giving -5 + 8 = 3°C, because students think 'colder' means the numbers get bigger
Getting -3°C by calculating -5 - 8 incorrectly, perhaps by thinking negative minus positive gives a smaller negative number

Exam Tip

Remember that 'colder' always means subtract, and 'warmer' means add, regardless of whether you start with a positive or negative temperature.

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