Worked Example 4: Real World Problem

Part of Negative Numbers · Section 9 of 14

Study NotesUnit: NumberGCSE

The temperature at midnight was −4°C. By morning it had risen by 9°C. What is the morning temperature?

Solution

Start temperature: −4°C

Temperature rise: +9°C

Final temperature: −4 + 9 = 5°C

This study notes covers Worked Example 4: Real World Problem within Negative Numbers for GCSE Mathematics. Revise Negative Numbers in Number for GCSE Mathematics with 12 exam-style questions and 22 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 9 of 14 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.

Practice questions for Negative Numbers

Which of these statements is true?

A. -8 > -3
B. -3 > -8
C. -3 < -8
D. -8 = -3

1 markfoundation

Aisha's bank account shows a balance of -45 pounds. She deposits 70 pounds. Explain what her new balance is and what the negative sign meant originally.

2 marksstandard

Quick recall flashcards

Using a number line

Draw a horizontal line with 0 in the middle. Negative numbers go LEFT, positive RIGHT. Moving right = adding, moving left = subtracting.

Double Negative Rule

Subtracting a negative = Adding. Two minuses make a plus: 5 − (−3) = 5 + 3 = 8

Worked Example 3: Double Negative

Higher Level: BIDMAS with Negatives

12 questions on Negative Numbers: practise free

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