This week we have been focusing on counting on and back in multiples of 10. We started by orally rehearsing our multiples of 10 which went very well, so we new we were ready for a challenge.
First, we learnt a very important fact: When we add 10 the ones stay the same and the tens change. This was such an important pattern to notice because it will help us when adding 10 to bigger numbers!
Then, we learnt that when we add ten ones to a number, for example 24 + 10, we have to regroup ten ones for one ten.
For example: 24 + 10 = 34
When we add 10 ones, 34 becomes made up of 2 tens and 14 ones. So, we must regroup and then 34 is made up of 3 tens and 4 ones.
Have a look below at some of us doing this practically with dienes first:
Once we learnt this and had lots of opportunity to practise using the dienes, we became whizzy mathematicians! Check out some of our maths learning from our books below:
Some of us have now got Next Steps in our books ready for the morning challenge!
How to help at home:
- Give your child some two digit numbers to add 10 to. Do they remember how to regroup?
- Continue to use Numbots to support your child with their calculations.
- For variation, can your child use money to add 10p to an amount?