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[accordion] [toggle title=”Prerequisites” state=”closed”]- A1a – Using and interpreting algebraic notation (essential)
- N9b – Multiplying and dividing in standard form (helpful for Exam-style question 5)
Substituting numerical values into formulae and expressions
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[tab title=”Extensions”]
Click the tabs for extension tasks…
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[tab title=”Task 1″]
- Find a possible value of \(n\) so that \(n+7\) is less than \(2n\).
- Find a possible value of \(n\) so that \(n+7\) is more than \(2n\).
- Find the value of \(n\) such that \(n+7=2n\).
- Find a possible value of \(x\) so that \(x+8\) is less than \(3x\).
- Find a possible value of \(x\) so that \(x+8\) is more than \(3x\).
- Find the value of \(x\) such that \(x+8=3x\).
- Can you find the value of \(x\) such that \(x+7=3x\)?
- Find a set of values of \(p\), \(q\), and \(r\) such that \(\dfrac{p+q}{r}=1\), where \(p\), \(q\), and \(r\) are positive integers.
- Find a different set of values of \(p\) \(q\), and \(r\) such that \(\dfrac{p+q}{r}=1\), where \(p\), \(q\), and \(r\) are positive integers.
- Find a set of values of \(p\), \(q\), and \(r\) such that \(\dfrac{p+q}{r}=1\) and \(p+q+r=25\). [/tab] [/tabs]
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[toggle title=”Teacher resources” state=”closed”]
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[toggle title=”In the real world” state=”closed”]
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- Slides in PPTX (with click-to-reveal answers)
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- Worksheet (with space for student work)
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[/toggle] [/accordion] [accordion] [toggle title=”What next?” state=”closed”] Substitution is a fundamental skill in algebra, along with solving equations. You will use it in many contexts. Two basic situations in which you will use substitution are (1) to plot a graph given its equation and (2) to use formulas to work out some useful information, such as the area of a shape: [/toggle] [/accordion]