1. LO To write equivalent expressions RAG
Key Words: Expression, Term, Equivalent
30-Nov-18
Starter Activity
If n = 4
What is the value of this expression?
How did you work it out?
If n = - 4
What is the value of this expression?
How did you work it out?
3n + 12
What must n be if the value of this expression is 42?
How did you work it out?

2. 3n + 12 How many different ways can we write 3n + 12?
Record pupils answers on the board, ask the class to correct any mistakes.

3. Today’s Task
Create an equivalent expressions spider diagram
Use substitution to check that your expressions are equivalent.
Task A
Using the symbols for addition and subtraction write as many different expressions as you can for your chosen expression.
Task B
Using the symbols for addition, subtraction, multiplication and division write as many different expressions as you can for your chosen expression.
Task C
Using the symbols for addition, subtraction, multiplication and division and using brackets and indices write as many different expressions as you can for your chosen expression.
15n + 9
6n2 + 9
36n - 30

4. Example of pupil’s work.

5. Example of pupil’s work.

6. Choose one of these statements and explain what is wrong
12 – g – 3 = g - 9 a + a + a – a + 2 – 8 = 4a + 6 4b + 2 = 4b + 2

7. In today’s lesson I created a poster of expressions equivalent to …………
In today’s lesson I created a poster of expressions equivalent to ………….. Equivalent means ……………. My understanding of this is red / amber / green