These are the multiples of ten which mark the tens boundary where the pattern of counting changes.

Counting forwards and backwards in 10s to 50

Maths

In this unit pupils will extend their counting to counting the decade numbers and making representations using a variety of different manipulatives. In the future 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 prior learning, pupils will have verbally counted beyond 20, recognising the pattern of the counting system. In this unit pupils will extend their counting o the decade numbers and represent them in different ways.

Counting in tens - decade numbers

Which of the following is not a decade number?

Andeep is counting forwards in tens. What is the next number he will say? 

I want to count forwards in tens starting from 30. What is the next number I will say?

She muddled up the teens and the decade numbers.

Laura is counting backwards in tens. What mistake has been made?

Put these numbers in the order you would say when counting forwards in tens.

Put these numbers in the order you would say when counting backwards in tens.

Which number will come next when counting forwards?  

When counting these numbers backwards, which will you say first?

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

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

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