A straight line of numbers, objects etc, arranged horizontally.

A repeated arrangement of numbers, colours or shapes which are related to each other in some way or linked by a certain rule.

A set of 10 numbers, all beginning with the same number of tens, e.g. 20,21…29.

Counting patterns within a decade

Maths

In this unit pupils will extend their learning by counting to 100. They will explore the pattern in counting and focus on the end of the decade and the start of the new decade numbers.  In the future unit pupils will explore the counting sequence for counting to 100 and beyond and represent the numbers from 20-99 in different ways, including marking the position on a number line.

In prior learning, pupils will have verbally counted beyond 20, recognising the pattern of the counting system. In this unit pupils will extend their learning by counting to 100 and exploring the pattern in counting.

Pattern in counting from 20 to 100

Which row of the one hundred square does the picture show? 

Which of these rows from the one hundred square should come first when counting forwards? 

Sort these numbers in the order you would say them when counting forwards along the row of the one hundred square.

Sort these numbers in the order you would say them when counting backwards along the row of the one hundred square.

Numbers can be said in different ways. Match the number to the correct way to say it.

Lucas is counting along one of these rows from the one hundred square. As he counts, he says 4 tens 3. which number is he counting?

Sort these numbers in the order you would say them when counting forwards.

Sort these numbers in the order you would say them when counting backwards.

Which of the following is a decade number?

Aisha is counting forwards in tens from 50. Which of the following numbers won't she say?

Lucas is counting backwards in tens from 70. Which of the following numbers won't he say?

Starter Quiz