Here are three sets of 10.

How many sets of 5 are there?

Five times

There are two sets of 5 in each 10 so

there must be six sets.

There are two sets of 5 in each 10 so

there must be six sets.

Five times

So what is 6 x 5 ?

Five times

3030

Five times

So what is 8 x 5 ?

Five times

4040

Five times

2 x 10 = 4 x 5

3 x 10 = 6 x 5

4 x 10 = 8 x 5

5 x 10 = 10 x 5

There is a pattern in the answers we have found. What

do you notice?

Five times

2 x 10 = 4 x 5

3 x 10 = 6 x 5

4 x 10 = 8 x 5

5 x 10 = 10 x 5

Five times

I can see doubling

and halving.

I can see doubling

and halving.

2 x 10 = 4 x 5

3 x 10 = 6 x 5

4 x 10 = 8 x 5

5 x 10 = 10 x 5

Give me an example.

Five times

2 x 10 = 4 x 5

3 x 10 = 6 x 5

4 x 10 = 8 x 5

5 x 10 = 10 x 5

Five times

4 is doubled to get 8.

10 is halved to get 5.

4 is doubled to get 8.

10 is halved to get 5.

2 x 10 = 4 x 5

3 x 10 = 6 x 5

4 x 10 = 8 x 5

5 x 10 = 10 x 5

What should go on this card?

Five times

2 x 10 = 4 x 5

3 x 10 = 6 x 5

4 x 10 = 8 x 5

5 x 10 = 10 x 5

Five times

It should be3½ x 10 = 7 x

5

It should be3½ x 10 = 7 x

5

2 x 10 = 4 x 5

3 x 10 = 6 x 5

4 x 10 = 8 x 5

5 x 10 = 10 x 5

So what is 7 x 5?

Five times

3½ x 10 = 7 x 5

2 x 10 = 4 x 5

3 x 10 = 6 x 5

4 x 10 = 8 x 5

5 x 10 = 10 x 5

Five times

3½ x 10 = 7 x 5

3535