# 7. Subtracting by counting back

We watched Numberblocks episode ‘Flights of Fancy’...

https://www.bbc.co.uk/iplayer/episode/m0006rrv/numberblocks-series-4-flights-of-fancy

We recapped the concept of counting on using a number line. As a class we ordered the numbers from 0-20. We picked a number between 0 and 20 and counted on from that number, then practised counting back using the giant number line.

We revised what this ‘-‘ symbol means and that numbers get smaller when we take away.

Today we are going to count back to help us take away. Look at this sum (9 - 3 =). Stand on 9 and jump back 3 spaces. Show that the number you land on is the answer.

Practise this using a number line. Make sure to emphasise that your pen/pencil/finger has to touch each number as you jump. Complete some subtraction number problems.

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We watched the Numberblocks episode ‘Heist’...

https://www.bbc.co.uk/iplayer/episode/m0006s63/numberblocks-series-4-heist

We practised counting back from different numbers to 0. We recapped the concept of taking away using objects and then counting back to takeaway using a number line. Practise counting back together to answer different subtraction number sentences.