Year 8 Maths Lesson 1: Algebra - Negative substitution

Learning Objectives:
Substitution with negatives
Reinforce algebra terminology

Introduction:
Substitution:
What does substitution mean?
What's a substitute teacher?
Explain: Use of brackets/multiplication for setting out
b = 3, c = 18
5b - 2c + c / b (expression)

a = -5, d = 9
(15/a) - (d/3)

b = -3, c = 2
3b²c + bc² + 5

b = c + 1
5b - 2c + c / b

Steps:
1. Put in multiplication signs
2. Replace pro-numerals
3. Evaluate (Remember O.o.O.)

Use the rule: y=-2x - 1:

x | y
-5|
-3|
-2|

Resources:
Heinemann 8
Worksheets 4.5/4.6

Extension Work:
Worksheet C4.6

Supplementary Work:

Timing:
My Introduction (My expectations = Mrs. Bailie's expectations) (5 min)
Intoduction (10 min)
Worksheet 4.5 (15 min)
Workbook exercises 4.4 pg. 144 (35 min)
--1) LHS + RHS
--2) a,c,d,f
--3) -> 8)
Extension worksheet (C4.6)/Challenge problems

Behavioural Management:
-

Scaffolding:
Order of operations

Homework:
Mathletics, Worksheet if unfinished