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Grade 3 · Maths · Lessons
Area is rows times columns
🟦tile🏠floor📏rows✖️times
Area.
The big ideaRows of squares: the sides tell how many. Rows times columns is the area.

How it works

Area is how much flat space a shape covers. We count it in squares.

For a rectangle, count the squares in one row, then multiply by the number of rows.

Rows times columns is the area.

4 × 4 = 16
4 rows of 4 squares: 4 × 4 = 16.

Example 1: Tiles on a floor

  1. A floor has 4 rows of 4 tiles. How many tiles cover it?
  2. Count the squares in a row, and the rows.
  3. Rows times columns gives the number of tiles.
  4. So the answer is 16.

Example 2: Width and height

  1. The shape is 9 units wide and 2 units tall. What is its area?
  2. The sides tell how many in a row and how many rows.
  3. Multiply the two sides.
  4. So the answer is 18.

Example 3: In centimeters

  1. The card is 9 centimeters wide and 7 centimeters tall. What is its area?
  2. Each square is 1 square centimeter.
  3. Multiply the two sides and write square centimeters.
  4. So the answer is 63.

Words to know

area
How many squares cover a flat shape.
square unit
A square used to measure area.

Watch out

Try it

  1. The shape is 2 units wide and 4 units tall. What is its area?
  2. The rug is 2 feet wide and 4 feet tall. What is its area?
  3. The card is 6 centimeters wide and 5 centimeters tall. What is its area?
Answers: 1. 8 · 2. 8 · 3. 30
For grown-upsTile a table top with sticky notes and count rows and columns instead of every square.
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