New
New
Year 5

Measure area using counting with squares as a strategy

I can use squares to cover the surface and count the area.

New
New
Year 5

Measure area using counting with squares as a strategy

I can use squares to cover the surface and count the area.

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Lesson details

Key learning points

  1. Using squares means that there are no gaps or overlaps.
  2. Fractions of squares can be added to make whole squares.

Common misconception

Pupils might count a part square - such as a triangle - as one square unit.

The slides show two parts moving together to make a whole square. Cutting out and physically moving the parts is an effective strategy.

Keywords

  • Area - The measurement of a flat surface. It measures a 2D space.

  • Square units - A square of a set size used to measure area.

In Cycle 3, pupils are asked to visualise parts of shapes being manipulated to form a rectangle. If they are unable to do so, print out the relevant slides so that they can cut out the shapes and re-form them as rectangles.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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6 Questions

Q1.
Put the missing words from the sentence into the correct order: ___ is the measurement of a ___ surface. It measures a ___ space.
1 - area
2 - flat
3 - 2D
Q2.
Which of these shapes is most commonly used for measuring the area of a 2D space, because it tessellates so well and has right angles?
circle
Correct answer: square
triangle
hexagon
Q3.
Which of the following shapes are rectilinear?
An image in a quiz
a
Correct answer: b
c
Correct answer: d
Q4.
What is the most efficient way of finding the area of this rectangle?
An image in a quiz
Count all of the individual squares.
Correct answer: Count the squares in one column and then count in steps of that number.
Count the squares in one row and then count in steps of that number.
Q5.
I am counting in threes: 3, 6, 9... Tick all of the numbers that would appear in the sequence when counting in threes.
11
Correct answer: 30
13
Correct answer: 21
Correct answer: 18
Q6.
Which of these would make one whole?
Correct answer: One half + one half
One quarter + one quarter
Correct answer: One quarter + three quarters
One half + one quarter
Correct answer: One third + two thirds

6 Questions

Q1.
This shape has an area of square units.
An image in a quiz
Correct Answer: 10, ten, Ten, 10.
Q2.
This shape has an area of square units.
An image in a quiz
Correct Answer: 16, 16, sixteen
Q3.
Which strategies could be used to find the area of this shape? Select all that apply.
An image in a quiz
Correct answer: Count the squares individually.
Add the square made of four squares to the rectangle made of 24 squares.
Correct answer: Split it into rectangles. 8 + 8 + 2 + 2
Correct answer: Split it into rectangles. 6 + 6 + 4 + 4
Correct answer: Subtract the square made of four squares from the rectangle made of 24 squares.
Q4.
This shape has an area of square units.
An image in a quiz
Correct Answer: 13, thirteen, 13., Thirteen
Q5.
This shape has an area of square units.
An image in a quiz
Correct Answer: 18, 18., eighteen, Eighteen
Q6.
This shape has an area of square units.
An image in a quiz
Correct Answer: 18, eighteen, 18., Eighteen