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📐 Mathematics - Class 8
Lesson 6 · The Unitary Method

The Unitary Method Presentation

MathematicsSubject
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Mathematics, Class 8 . Unit 6

The Unitary Method

Direct variation · Indirect variation · One unit to the answer

What We Learn Today

🔗

Tell direct and indirect variation apart

1️⃣

Find the value of one unit

⚖️

Set up a proportion and solve it

↕️

Read the arrows in a table

Two Kinds of Relation

📈Direct variation
One goes up, the other goes up
More time, more distance
More pencils, more cost
VS
📉Indirect variation
One goes up, the other comes down
More people, fewer days
More speed, less time

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Presenter notes: Today's lesson is about how two quantities change together and how that lets us solve problems. Before starting, ask the class how they would work out the price of five kilograms of rice if they knew the price of one.