Gattegno Tens Charts Term 1 Mathematics

We are learning to: Explore and describe number patterns that occur when multiplying by 10,100 or 1000.

Yesterday we… Looked at the patterns that occur when multiplying by 10,100 & 1000. We even talked about what happens when you multiply by 10 000, 100 000 and even 1 000 000. We noticed that when you multiply by one of these numbers the answer is always even. We also noticed that the number of 0s in the number you multiply by and your answer are directly related.

Today we are … Using Gattegno tens charts to help you remember how to multiply by 10, 100 & 1000. Dividing by 10,100 & 1000 using a Gattegno chart.

But before we start … We need to do a quick investigation into what happens when we divide by 10, 100 & 1000.

Pick 5 numbers larger than 1000… Use this space to divide them by 10,100 & 1000.

What did you see ? Write here what you noticed with dividing patterns.

A Gattegno Tens Chart looks like this … What patterns can you see ? Are these patterns related to what we have been doing ? How ?

We are going to play a game … The game works like this… pick a number like 5500 So you start with your number and multiply and divide by ten until you get back to your original number. That might look like this. 5500 x 10 =55 000 55 000 ÷ 100 = 550 550 x 10 = 5500 Because you can see I have got back to my number I can tick this sum

Your turn… Have a go with three or four different numbers Show your working here.

Did you notice any patterns ? Write what you noticed here.

A challenge … See if you can use a number and multiply and divide it by 10,100 & 1000 at least 6 times before getting your original number.