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# Algebraic Notation

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## Mr Mattock

on 29 October 2017

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#### Transcript of Algebraic Notation

Algebraic Notation
Activity
Sort the cards into expressions, equations and formula.
How are expressions used?
Expression
2x + 1
Understanding Letters
x + 3 = 5

x + 3 = y

1
x
Understand the different roles that letter play in
maths and
= 0
Decoding Expressions
A number:
A number times 2:
A number subtract 2:
A number subtracted from 2:
A number divided by 2:

A number divided into 2:

A number squared:
n
n+2
2n
n-2
2-n
n
2
2
n
n
2
Decoding Expressions
4p - 2 means "p...........4 then .............2."

2 - 4q means "q..........-4 then ............2."

4(3x + 5) means "x .......... 3 then ..........5
then ............4 then ............ 7."
7
Decoding Expressions
4p - 2 means "p.times.4 then .subtract. 2."

2 - 4q means "q .times. -4 then .add. 2."

4(3x + 5) means "x .times. 3 then .add. 5
then .times. 4 then .divide by. 7."
7
Decoding expressions
Fill in the blank spaces to describe the expressions.
Equation
2x + 1 = 7, 2x + 1 = x + 3
Formula
2x + 1 = y
Sequence
3, 5, 7, 9, 11, ...
Function
f(x) = 2x + 1
Set equal to a value or another expression with the same letter.
Set equal to a different letter
Work it out when x = 1, 2, 3, 4, 5, ...
Set equal to f(x)
Decoding expressions
Work together to fill in the blank spaces.

(b) times, subtract

(d) subtract, divided by

(g) times, subtract, times

(h) times, subtract, divide
Activity
Activities
Key
Examples

Activity