BIG IDEA
Understand the idea before memorising a rule.
Linear equations is part of geometry. At Grade 7, the goal is to connect this topic to a clear method, relevant evidence and a final check. You will apply that idea to a real geometry question at this grade level.
YOU WILL LEARN TO
- Explain the key ideas in linear equations using accurate mathematics vocabulary.
- Apply a reliable method to a new linear equations task.
- Check the result and explain why the evidence supports it.
METHOD
A reliable three-step approach
- 1
Identify the information and the unknown.
- 2
Choose a rule or operation and show every step.
- 3
Check the result with estimation, substitution or units.
WORKED EXAMPLE
During a class warm-up for Grade 7, a rectangle is 9 cm long and 3 cm wide. What is its area?
Model response
The correct answer is 27 cm². Area = length × width = 9 × 3 = 27 cm².
KNOWLEDGE CHECK