The number after a given number is one more than it.

The number before a given number is one less than it.

A number that is before another comes earlier in our count.

A number that is after another comes later in our count.

Show one more and one less than a number using representations

Maths

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.

Composition of numbers 0 to 5

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

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

One more than 3 is 4, so one less than 4 is _

One less than 5 is 4, so one more than 4 is _

Laura thinks the missing number will be the same for both of these. Is she correct? 

Andeep thinks the missing number will be the same for both of these. Is he correct? 

What is the next number in the count when counting forwards from 2?   2, 3, _

What is the next number when counting back from 5?   5, 4, _

This lesson will soon be taken down.

Show one more and one less than a number using representations

Lesson outcome