Maths KS2: Weighing and measuring

At the Grecian pizza parlour apprentice, Ambrose, is learning from his boss how to make lots of pizzas from a 2kg weight of dough.

Ambrose must work out how to make 20 small pizza bases that are equal size and weight.

He tackles the problem by breaking off pieces randomly, resulting in some large and some small pizzas.

It is suggested he uses weighing scales.

Three questions of increasing difficulty help to work out how to solve the problem including having a mixture of large and small pizzas to make from the 2kg dough.

This is from the series: Let's Do Maths

Teacher Notes

This clip tackles the difficulty children experience in choosing the correct operation when solving problems.

In this case it is division. To solve this they will also need to know that there are 1000g in a kilogram.

Three differentiated questions help to structure the problem and the last question has a mixture of pizzas and requires more than one step to find the solution.

Use the statement posed in the clip "Out of 2kg of dough, we make 20 pizzas".

Ask the children how many grams of dough it takes to make 1 pizza? 5 pizzas? 2 and 1/2 pizzas?

Can anyone convert that into imperial units? Does anyone know what ingredients dough is made out of?

Watch the clip further and get the children to discuss what mistakes Ambrose is making and how he should be doing it.

Watch the clip further and discuss the question posed. With a variety of statements based on the pizzas, get the children to rearrange these to form the problem.

The children should discuss which the relevant and irrelevant information is and what they should get rid of, as well as how they can calculate it.

Curriculum Notes

This clip will be relevant for teaching Maths at KS2 in England and Wales and Second Level in Scotland and KS1 and KS2 in Northern Ireland.

More from the series: Let's Do Maths

Maths KS2: Using weights and measures
Maths KS2: Using timetables and the 24 hour clock
Maths KS2: Using grams and kilograms
Maths KS2: Using a compass and reading maps
Maths KS2: Using a calendar
Maths KS2: Units of time
Maths KS2: Understanding radius and diameter
Maths KS2: Understanding area and perimeter
Maths KS2: Understanding angles
Maths KS2: Problem solving with money
Maths KS2: Problem-solving with equilateral triangles
Maths KS2: Playing with polygons
Maths KS2: Measuring distance