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Rearranging formulae (Edexcel GCSE Maths): Quizzes

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Rearranging formulae

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In the formula $V = lwh$ , which letter is the subject?

$V$

What defines the subject of a formula?

Letter alone on one side with no terms

What is the first step when finding a missing value that is NOT the subject?

Substitute known values

Using $P = 8h + 12v$ , if $P = 140$ and $h = 10$ , find $v$ .

$v = 5$

When rearranging formulae, what key principle must you follow?

Do same operation to both sides

Make $r$ the subject of $T = r + 3s$ .

$r = T - 3s$

When making a positive term the subject, what should you do first?

Subtract other terms

Make $b$ the subject of $A = \frac{1}{2}bh$ .

$b = \frac{2A}{h}$

When the subject appears inside brackets, what should you do?

Expand first if necessary

Make $p$ the subject of $N = 2p + 3q^2$ .

$p = \frac{N - 3q^2}{2}$

How can you check if your rearranged formula is correct?

Substitute back into original

Make $Q$ the subject of $R = 1 - 5Q$ .

$Q = \frac{1 - R}{5}$

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Rearranging formulae (Edexcel GCSE Maths): Quizzes

Practise the questions

In the formula V=lwhV = lwhV=lwh, which letter is the subject?

What defines the subject of a formula?

What is the first step when finding a missing value that is NOT the subject?

Using P=8h+12vP = 8h + 12vP=8h+12v, if P=140P = 140P=140 and h=10h = 10h=10, find vvv.

When rearranging formulae, what key principle must you follow?

Make rrr the subject of T=r+3sT = r + 3sT=r+3s.

When making a positive term the subject, what should you do first?

Make bbb the subject of A=12bhA = \frac{1}{2}bhA=21​bh.

When the subject appears inside brackets, what should you do?

Make ppp the subject of N=2p+3q2N = 2p + 3q^2N=2p+3q2.

How can you check if your rearranged formula is correct?

Make QQQ the subject of R=1−5QR = 1 - 5QR=1−5Q.

Explore Edexcel GCSE Maths Revision Notes by Topics

Collecting like terms

Simplifying expressions

Algebraic indices

Substitution

Formulae

Writing formulae

Expanding brackets

Factorising

Linear equations 1

Linear equations 2

Inequalities

Solving inequalities

Sequences 1

Sequences 2

Coordinates

Gradients of lines

Linear equations 1

Linear equations 2

Inequalities

Solving inequalities

Sequences 1

Sequences 2

Coordinates

Gradients of lines

Straight-line graphs 1

Straight-line graphs 2

Real-life graphs

Distance-time graphs

Rates of change

Expanding double brackets

Quadratic graphs

Using quadratic graphs

Factorising quadratics

Quadratic equations

Cubic and reciprocal graphs

Simultaneous equations

Rearranging formulae

Using algebra

Identities

Explore Edexcel GCSE Maths Model Answers by Topics

Collecting like terms

Simplifying expressions

Algebraic indices

Substitution

Formulae

Writing formulae

Expanding brackets

Factorising

Linear equations 1

Linear equations 2

Inequalities

Solving inequalities

Sequences 1

Sequences 2

Coordinates

Gradients of lines

Linear equations 1

Linear equations 2

Inequalities

Solving inequalities

Sequences 1

Sequences 2

Coordinates

Gradients of lines

Straight-line graphs 1

In the formula $V = lwh$ , which letter is the subject?

Using $P = 8h + 12v$ , if $P = 140$ and $h = 10$ , find $v$ .

Make $r$ the subject of $T = r + 3s$ .

Make $b$ the subject of $A = \frac{1}{2}bh$ .

Make $p$ the subject of $N = 2p + 3q^2$ .

Make $Q$ the subject of $R = 1 - 5Q$ .