New
New
Year 5

# Calculate the areas of rectangles using multiplication

I can calculate the areas of rectangles using multiplication.

New
New
Year 5

# Calculate the areas of rectangles using multiplication

I can calculate the areas of rectangles using multiplication.

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## Lesson details

### Key learning points

1. To find the area of a rectangle you multiply the length by the width
2. Known facts, mental and written strategies can be used to calculate area
3. The area of a rectangle is similar to an array for multiplication

### Common misconception

Good multiplication skills are required for this lesson, including TO x O and HTO x O.

Pupils who are insecure with short multiplication will need pre-teaching. Consider giving them a scaffold such as a times tables grid.

### Keywords

• Length / width - Length and width are two words used to describe the sides or dimensions of polygons.

Cycle 2 of the lesson can be enriched and made more tangible by substituting the maps with aerial maps of your local area, using digital software and marking out rectangles of area on them.
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).

## Starter quiz

### 6 Questions

Q1.
A square is a type of .
circle
triangle
Q2.
6 x 7 = .
Q3.
23 x 4 = .
Q4.
How many centimetres are in one metre?
10
1,000
Q5.
How many millimetres are there in one metre?
10
100
10,000
Q6.
A rectangle has an area of 24 cm². What are the possible values of the length and width?
Correct answer: 4 cm and 6 cm
5 cm and 4 cm
Correct answer: 8 cm and 3 cm
Correct answer: 12 cm and 2 cm
5 cm and 5 cm

## Exit quiz

### 6 Questions

Q1.
What is the area of this shape? cm²
Correct Answer: 54, 54 cm², 54 square centimetres, 54 centimetres squared, fifty four
Q2.
What is the area of this square? cm²
Correct Answer: 25, 25 cm², 25 centimetres squared, 25 square centimetres
Q3.
Which strategy has been used to calculate the area of this rectangle?
expanded multiplication
short multiplication