Year 8
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Lesson details
Key learning points
- In this lesson, we will investigate the relationship between different inequalities using bar models and "always, sometimes, never" statements.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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3 Questions
Q1.
I'm thinking of a number (call it x). If I multiply it by 3 then add 4 to it, what expression do I get?
3(x + 4)
4(x + 3)
4x + 3
Q2.
I'm thinking of a number (call it x). If I multiply it by 3 then add 4 to it, my answer is less than 19. What range of values can my number take?
x < 4
x > 4
x > 5
Q3.
I'm thinking of a number, I subtract 4 from it and then divide it by 6. My number is greater than 2. What range of values can my number take?
x > 24
x > 36
x > 6
3 Questions
Q1.
Given that x > y, is the following inequality always, sometimes or never true? x + 2 > y + 2
Never true
Sometimes true
Q2.
Given that x > y, is the following inequality always, sometimes or never true? y > x + 5
Always true
Sometimes true
Q3.
Given that x > y, is the following inequality always, sometimes or never true? 2x > y + 4
Always true
Never true