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Substitution inquiry

Inquiry Maths

Link to the Inquiry Maths website

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Inquiry prompt

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What question can you ask about the prompt?

What do you notice?

What do you wonder?

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Inquiry prompt

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Inquiry Maths

Link to the Regulatory Cards

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Preliminary task

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Exploration

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Is it possible to find negative numbers, fractions or decimals that satisfy the inequality?

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Line of inquiry 2

Change the prompt

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Examples

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Change the expressions in the prompt.

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Change the prompt by using three or more variables.

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List all the different inequalities you can make.

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Line of inquiry 3

Permutations

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See the solutions for challenge 1 (slide 24) for an example.

Students can extend the inquiry even further by using more than two variables (see slide 27), by making up their own expressions or by using more than three expressions.

In the last case, they could aim to find values for a and b that satisfy the 24 permutations of the expressions in the original prompt.

Teacher’s notes

Expression 1

Expression 2

Expression 3

lowest

middle

highest

lowest

highest

middle

middle

lowest

highest

middle

highest

lowest

highest

lowest

middle

highest

middle

lowest

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Inequality

 

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Inequality

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Inequality

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Inequality

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Inequality

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Line of inquiry 4

A special inequality

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