A bar model is a pictorial representation of a problem where bars are used to represent the known and unknown quantities.

Use a bar model to represent a whole partitioned into two parts

Maths

Explain that numbers can represent how many objects there are in a set

Ordinal numbers show the position of an object in relation to another

Partition numbers one to five in different ways

Partition the numbers one to five in a systematic way

Find a missing part when one part and the whole is known

Solve problems finding a missing part when one part and the whole is known

Show one more and one less than a number using representations

Show one more and one less than a number using representations and describe this accurately

Solve problems using a bar model to represent a whole partitioned into two parts

In this unit pupils will revisit how numbers are represented cardinally and ordinally. They will partition 1 - 5 in different ways and find a missing part. In the future unit pupils will represent numbers 6 - 10 by partitioning in different ways. They will learn what odd and even numbers are and how they can be partitioned. They will identify a missing part when a whole is partitioned into 2 parts

In prior learning, pupils will have explored the composition of numbers to 10 and be able to subitise up to 5. In this unit pupils will partition 1 to 5 in different ways and find a missing part.

In this unit pupils will revisit how numbers are represented cardinally and ordinally. They will partition 1 - 5 in different ways, find a missing part when one part and the whole are known and explore one more and one less with numbers to five.

Composition of numbers 0 to 5

to put the parts together to make the whole. 

Which bar model is showing these cubes partitioned correctly?

Which bar model matches the part-part-whole model?

Jacob has 2 cubes and Izzy has 1 cube. Which bar model is correctly showing their cubes?

Jacob thinks the missing part will be the same for all of these. Is he correct?

Izzy thinks the missing part will be the same for all of these. Is she correct?

Which part-part-whole model is showing Jacob’s cubes correctly partitioned?

Which part-part-whole model is showing the birds correctly partitioned?

Use a bar model to represent a whole partitioned into two parts

Lesson outcome