FM L2.3 Evaluate expressions and make substitutions in given formulae in words and symbols

This revision aid for L1/L2 (mainly L2) Pearson Edexcel Functional Skills maths gives a side-by-side comparison of perimeter, area and volume, the sort of units that would be involved with each and a worked Functional Skills example of each with a PAV mnemonic for remembering which is which. I have also looked through the last few years of Pearson Edexcel FS for the sorts of questions that require each one. 
Note: All images from Pixabay, so do not need crediting.

Editor's note

Level
L2
GCSE L1-5
Maths
FM Complex multi-step problem(s)
FM L2.3 Evaluate expressions and make substitutions in given formulae in words and symbols
FM L2.16 Calculate perimeters and areas of 2-D shapes including triangles and circles and composite shapes including non-rectangular shapes (formulae given except for triangles and circles)
FM L2.17 Use formulae to find volumes and surface areas of 3-D shapes including cylinders (formulae to be given for 3-D shapes other than cylinders)
GCSE G14 (use units of measure)
GCSE G16 (area, volume)
GCSE G17 (circles, perimeter)
Context
Catering Food Nutrition

This is a handout for Functional Skills L1/L2 which talks about formulas, substitution and BODMAS (BIDMAS).

“Editor’s note*
It includes worked examples from past papers and useful tips and hints. Fully mapped to L2 FM and GCSE Maths 1-5

Level
L2
GCSE L1-5
Maths
FM Contextualised underpinning
FM L1.7 Follow the order of precedence of operators
FM L2.3 Evaluate expressions and make substitutions in given formulae in words and symbols
L2.12 Follow the order of precedence of operators, including indices
GCSE A1 (Algebraic notation)
GCSE A2 (Substitution)
GCSE A3 (Algebraic concepts & vocabulary)
GCSE A4 (Simplify & manipulate algebraic expressions)
GCSE A5 (Use & rearrange formulae)
AN N1/L2.4
General
Exam tips and help

A set of Formula 1 scenarios based on the four rules of mathematics and using formulae expressed in words and/or numbers. This resource tests students’ ability to use formulae to solve problems based on a motor racing car travelling on a race track. Some of the scenarios test the students ability to convert units to get a sensible answer. I encourage my students to estimate the answers before attempting for real! Some do, some don’t …

Level
L1
L2
GCSE L1-5
Maths
FM L1.5 Use simple formulae expressed in words for one or two-step operations
FM L2.3 Evaluate expressions and make substitutions in given formulae in words and symbols
GCSE A2 (Substitution)
AN N1/L1.11
AN N1/L2.4
Context
Sport
Motor vehicles & Transport