Partition is to split a whole up into parts.

Combine means to put parts together to make a whole.

A bar model is a pictorial representation of a problem where bars are used to represent the whole and the parts.

Solve problems using 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

Use 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

Jun and Sofia have thrown 5 counters. Which bar model is showing their counters?

Jun and Sofia have thrown 4 counters. Which bar model is showing their counters?

How many more fingers does Sofia need to show?

How many more fingers does Jun need to show?

Which set of counters will come next if we are working systematically?

Which bar model represents the next set of counters if we are working systematically?

Which one of these is showing a bar model?

Which bar model is showing Sofia’s counters correctly partitioned?

Jun has 3 cubes and Sofia has 1 cube. Which bar model is showing their cubes combined?

Jun has 2 counters and Sofia has 1 counter. Which bar model is showing their counters combined?

Finding an order to partition the 3 counters.

Jun is working systematically to find all the ways to partition 3 counters. What does systematically mean?

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

Lesson outcome