Gattegno Tens Charts Term 1 Mathematics We are

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. We noticed that when you multiply by one of these numbers the answer is always even. We also noticed that the number of 0 s 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 ÷ 100 = 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.