Calculate the area of shapes made from 2 rectangles by decomposing the shape in different ways

Maths

In this unit pupils will calculate the area of a rectangle using multiplication and use their knowledge of area to solve problems. In the future unit pupils will explain what volume is using a range of contexts and describe the units used to measure volume. They will explain how to calculate the volume of a cuboid.

In the prior unit pupils explained area and measured using counting as a strategy. They made different shapes with the same area and compared the area of different shapes. In this unit pupils will calculate the area of a rectangle using multiplication and use their knowledge of area to solve problems.

Link area of rectangles to multiplication

Match the start and end of the sentences to describe the shapes correctly.

Which times tables facts are needed to calculate the area of the shape?

True.  The smaller rectangle has changed position.

False.  The area of the shape is different.

True or false.  These rectilinear shapes show the same area.

Calculate the area of this rectilinear shape. {{ }} m²

To calculate the {{ }} of a rectangle, multiply the length by the width.

What is the area of this square? {{ }} cm².

Calculate the area of this rectangle.  A = {{ }} cm².

What is the area of the lawn if the sides measure 13 m and 9 m?

A picture is put into a frame that is 17cm long and 8 cm wide. What is the area of the glass in the frame? {{ }} cm².

The school hall measures 25 m by 9 m.  What is the area of the hall floor? {{ }} m².

This lesson will soon be taken down.

Calculate the area of shapes made from 2 rectangles by decomposing the shape in different ways

Lesson outcome