1. Substitution – Level 4 - 6 14/11/2018
LO: To s…………….. numbers into e………………
substitute
expressions
Starter:
What does substitution mean?
Where does substitution happen in real life?
Red
Amber
Green
2x + 1, x= 4
4y² + 2, y= 2
2x² + 3x, x=-2 9 18 2

2. Real life example of substitution
Key words:
Substitute– to replace
Expression– Numbers and letters, no equal sign
LO: To substitute numbers into expressions.

3. Steps to success
Red (4)
I can successfully substitute numbers into basic expressions
e.g x + 5, x= 2
Amber (5)
I can substitute numbers into more difficult expressions
e.g 4x + 1, x= 3
Green (6)
I can substitute into expressions with powers and more than one letter
e.g 2y²+ 3y, x= 4
Challenge (6/7)
I can substitute into expressions with powers and more than one letter
e.g 2y²+ 3y, x= -2

4. Red Red - Support Amber Amber – Task 1 Green Green – Task 2 9 18 2
2x + 1, x= 4 9
Amber
Amber – Task 1
4y² + 2, y= 2 18
Green
Green – Task 2
2x² + 3x, x=-2 2
LO: To substitute numbers into expression.

5. Amber – Task 1 Green – Task 2
LO: To substitute numbers into expressions.

6. 5x – 4 , x = 3 3 11 19 Red Substitute the number into the expression:
What is the correct answer? 3 11 19
LO: To substitute numbers into expressions.

7. 2x² + 1 , x = 2 9 5 3 Amber Substitute the number into the expression:
What is the correct answer? 9 5 3
LO: To substitute numbers into expressions.

8. Green
Substitute the number into the expression:
3x² + 1 , x = -2
What is the correct answer? 13
-11 7
LO: To substitute numbers into expressions.

9. Steps to success
Red (4)
I can successfully substitute numbers into basic expressions
e.g x + 5, x= 2
Amber (5)
I can substitute numbers into more difficult expressions
e.g 4x + 1, x= 3
Green (6)
I can substitute into expressions with powers and more than one letter
e.g 2y²+ 3y, x= 4
Challenge (6/7)
I can substitute into expressions with powers and more than one letter
e.g 2y²+ 3y, x= -2

10. Amber – Task 1 Green – Task 2
LO: To substitute numbers into expressions.

11. Support: Challenge: If a = 2 and b = 10 If a = 2 and c = -2 5a 5a² 3b
3c² + c 20 12 30 11 7 15 39 26 14 10
Note:
5a means 5 x a,
so 5 x 2 =
Note:
2a² means 2 x a²,
so 2 x 4 =

12. 8 3 9 14 8 10 6 1 3 10 12 1 21 10 -3 2 Individual Questions (A)
Individual Questions (B) 8
1) x + 3, x= 5
1) x - 4, x= 7 3
2) 5x - 1, x= 2 9
2) 3x + 2, x= 4 14
3) y² + 2y, y= 2 8
3) 2y² + y, y= 2 10 6 1
Challenge: 2x² + x, x=-2
Challenge: 3x² + 2x, x=-1
Individual Questions (C)
Individual Questions (D) 3
1) x - 2, x= 5
1) x + 7, x= 3 10
2) 3x + 3, x= 3 12
2) 2x - 3, x= 2 1
3) y² + 3y, y= 2
3) 2y² + y, y= 3 21 10 -3 2
Challenge: x² + 4x, x=-1
Challenge: 2x² + 3x, x=-2

13. Steps to success
Red (4)
I can successfully substitute numbers into basic expressions
e.g x + 5, x= 2
Amber (5)
I can substitute numbers into more difficult expressions
e.g 4x + 1, x= 3
Green (6)
I can substitute into expressions with powers and more than one letter
e.g 2y²+ 3y, x= 4
Challenge (6/7)
I can substitute into expressions with powers and more than one letter
e.g 2y²+ 3y, x= -2

14. Challenge: Can you find the Champions League top goal scorer 2014/2015 ?
Neymar
Suarez
Tevez
Ronaldo
Benzima
3u + 3 , u= 2
3t - 3 , t= 3
2m - 3 , m= 5
4s + 2 , s= 2
5a - 13 , a= 4 9 6 7 10
Goals: 7
Goals:
Goals:
Goals:
Goals:
Messi
Gerrard
Brahimi
Hazard
Martinez
5b - 5 , b= 3
3x - 28 , x= 10
2v - 1 , v= 3
2c² + 1 , c= -1
e² + 3 , e= -2 10 2 5 3
Goals: 7
Goals:
Goals:
Goals:
Goals:

15. 10 10 Messi Ronaldo 4s + 2 , s= 2 5b - 5 , b= 3 Goals: Goals:
LO: To substitute numbers into formulae.

16. Support: Challenge: If a = 2 and b = 10 If a = 2 and c = -2 5a 5a² 3b
3c² + c
Note:
5a means 5 x a,
so 5 x 2 =
Note:
2a² means 2 x a²,
so 2 x 4 =

17. Challenge: Can you find the Champions League top goal scorer 2014/2015 ?
Neymar
Suarez
Tevez
Ronaldo
Benzima
3u + 3 , u= 2
3t - 3 , t= 3
2m - 3 , m= 5
4s + 2 , s= 2
5a - 13 , a= 4
Goals:
Goals:
Goals:
Goals:
Goals:
Messi
Gerrard
Brahimi
Hazard
Martinez
5b - 5 , b= 3
3x - 28 , x= 10
2v - 1 , v= 3
2c² + 1 , c= -1
e² + 3 , e= -2
Goals:
Goals:
Goals:
Goals:
Goals:

18. Task 1

19. Task 2

20. Individual Questions (A)
Individual Questions (B)
1) x + 3, x= 5
1) x - 4, x= 7
2) 5x - 1, x= 2
2) 3x + 2, x= 4
3) y² + 2y, y= 2
3) 2y² + y, y= 2
Challenge: 2x² + x, x=-2
Challenge: 3x² + 2x, x=-1
Individual Questions (C)
Individual Questions (D)
1) x - 2, x= 5
1) x + 7, x= 3
2) 3x + 3, x= 3
2) 2x - 3, x= 2
3) y² + 3y, y= 2
3) 2y² + y, y= 3
Challenge: x² + 4x, x=-1
Challenge: 2x² + 3x, x=-2