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Grade 4

Perimeter, area, and measurement choice

Decide whether a problem is asking about the boundary around a shape or the space inside it.

Category: Number Sense & Math Thinking 10 min Confident
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Perimeter measures distance around the edge. Area measures the surface covered inside. The question clue matters.

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A Picture card
Sound card Quick practice

A rectangular garden is 8 m long and 5 m wide. How much fencing is needed?

perimeter clue

Fencing goes around the outside edge.

Example: Perimeter = 8 + 5 + 8 + 5 = 26 m

T Picture card
Sound card Quick practice

The same garden needs grass seed. How much ground is covered?

area clue

Grass covers the inside surface.

Example: Area = 8 x 5 = 40 square m

A Picture card
Sound card Quick practice

A ribbon goes around a gift box.

real-life clue

This is a perimeter situation.

Example: Ribbon length uses perimeter thinking.

T Picture card
Sound card Quick practice

Tiles cover a classroom floor.

real-life clue

This is an area situation.

Example: Floor coverage uses area thinking.

More in this topic

Keep the reading rhythm going with another tiny lesson.

Grade 4

Place value and rounding

Use thousands, hundreds, tens, and ones to read larger numbers and round them sensibly.