Crossing the tens boundary counting forwards and backwards

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

Aisha starts counting at 49 and finishes at 54. She must be counting __________.

When counting backwards from 60, which of these numbers would come first in the count?

 Lucas is counting forwards from a number ending in 9. What was the number he started at?

Aisha is counting backwards from a decade number. What was the decade number she started at?    

Lucas is counting forwards from 45. What is the next decade number he will say?  

Aisha is counting backwards from 45. What is the next decade number she will say? 

When does the pattern of counting change when counting backwards?

I'm thinking of a number. It is in the fifties and ends in 6. What is my number?

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

Lucas counts backwards from the number 76. What numbers will he say next?

When counting forwards from 34, which of these numbers will you say?

When counting backwards from 34, which of these numbers will you say?

Starter Quiz