Key Stage 3 Maths - Lesson Objectives, Keywords and Resources - Year 7 - Algebra

Rules of algebra - Terminology

The General Rule

Treat variables just like ordinary numbers

AddingVariables

a + a + a + a + a = 5a.

b + b + b + b = 4b.

f + f + g + g + g = 2f + 3g

Subtracting Variables

7f - 3f = 4f

19g - 6g = 13g

Multiplying Variables

4 x 3p = 12p

6 x 5m = 30m

Dividing variables

18x ÷ 3 = 6x

21w ÷ 7 = 3w

Powers and Indexes

h x h = h2

t x t x t = t3

Resources:

Terminology | More Rules | Worksheets

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