Lesson video

Hi everyone, my name is Miss Sabzvari and I'm really excited you decided to join me today for our maths lesson.

The unit we're studying is multiplication and division.

In the previous lesson we focused on calculating the multiplication table of 10, by skip counting.

In this lesson we'll focus on spotting patterns in the two, five and 10 multiplication tables.

So, when you're ready, let's begin.

So, let's have a look at today's lesson agenda.

First we'll begin by spotting patterns in the multiplication table of two.

Then we'll move on to our talk task.

After that we'll be spotting patterns within and across the two, five and 10 multiplication tables.

And finally, you will complete you're independent task.

And before we begin today's lesson, you will need the following items. You will need something to write with and something to write on.

You will need some cubes or counters.

Alternatively, you can ask your parent or carer to cut our some small pieces of paper that you can use instead.

And finally you will need a 100 square.

So, please pause the video now and get the items that you need.

Spotting patterns in the multiplications table of two.

So, let's have a look at the numbers square on your screen.

What I would like you to do, to have a look at the numbers which are shaded and to answer the following question.

What multiplication table do all these numbers belong to? Pause the video now and share your answer with the screen.

Great job! So, all these numbers, as we know, are multiples of two.

My turn, your turn.

Multiple, multiple.

A multiple is when one number can divide exactly into the second number.

Okay? So for example, I could say that 10 is multiple of two because 10 divided into two exactly.

Okay? So 10 is a multiple of two.

Good job.

Great job.

So, pause the video now and tell your screen what a multiple is? Good work.

What patterns do you notice in the multiples? Pause the video now and share your answer with the screen.

Great job.

So, I can see that the multiple of two are even numbers and their ones digit is always zero, two, four, six or eight.

Now what I would like you to do, is to tell me, what is the next multiple? And how do you know? So I would like you to work out all the multiples of two all the way until 100.

Pause the video now.

Great job.

So we can see that all the multiples of two are even.

Now, moving on to our talk task.

What I would like you to do, is to place counters on the multiples of five this time.

Okay? And then I would like you to place counters on the multiples of 10.

And I would like you to look for patterns just how we have been doing for the two multiplication table.

Okay? So, if you don't have a number grid, what I would like you to do.

so pause the video.

And to draw one on your piece of paper.

And then place counters on the multiples of five and multiples of 10.

Do that now.

Great job! So, let's have a look at the answers.

My multiples of five have a green circle around them and the multiples of 10 have a yellow circle around them.

Okay? What did you spot.

what patterns did you spot in the multiples of five? And the multiples of 10? Share your answer with the screen.

Great job.

So, you might have noticed that all the multiples of five end in zero or five.

That's right.

And that multiples of 10 all end in zero.

Okay? So, great job! So, can you spot any numbers that are multiples of 10 and multiples of five? Excellent job! So all the ones that end in zero are both multiples of 10 and multiples of five.

Great work.

Spotting patterns within and across the multiplication tables.

So, on my number grid you can see the multiplications of two are highlighted in red.

The multiplication table five is in green and 10 is in yellow.

Okay? I would like you to tell me, and to pause the screen and to tell me, which numbers are multiples of two and multiples of five? Do that now.

Great job.

So, we can see that 10, 20, 30, 40, 50, 60, 70, 80, 90 and a 100 are both multiples of two and five.

Okay? Because they both end in zero.

And they are both in the two and the five times tables.

Good job.

Now let's have a look at our statement and I want you to decide if the statement is true or if the statement is false.

Okay? Follow with me.

"All multiples of 10 are multiples of two and five" Is this statement true or false? Pause the video now and share you're answer with the screen.

Great job.

So, we can see that the multiples of 10 are highlighted in yellow.

Okay? And we can see that they are also multiples of two and five.

So this statement is true.

All multiples of 10 are multiples of two and five.

Great work.

let's have a look at our next statement.

"All multiples of five are multiples of two and five" Is this statement true or false? Share your answer with the screen.

Good work.

So, we can see our multiples of five in green and our multiples of two in red.

Okay? Not all multiples of five are multiples of two and five.

Because we can see that the ones that end in five are not multiples of two.

Good job.

So, this statement is false.

Not all multiples of five are multiples of two as well.

And moving on to our quick check question.

So, what I would like you to do, is to point after three, two, one.

So, whether you think the statement is true or false? Are you ready? "37 is in the multiplication table of two" And three, two, one.

Point.

Its false! Good job.

How did you work it out? Pause the video and tell your screen.

Great work.

So, some of you might have skip counted in two's.

Okay? Until you got to 30's.

And some of you might have remembered all the patterns that we were discussing earlier.

So, we know that all multiples of two are even and that they all.

their ones digit ends in two, four, six or eight or zero.

Okay? And 37 does not follow that pattern.

Great job.

"45 is in the multiplication table of five" Is this statement true or false? And three, two, one.

Point.

Its true! Good job.

We know that 45 is in the multiplication table of five.

But how do you know? Tell your screen.

Great job.

We know that 45 ends in five.

Okay? And we know that all multiples of five end in five or zero.

So this follows the pattern.

Good job.

"And 99 is in the multiplication table of 10" Is this statement true or false? In three, two, one.

Point.

So we know that 99 is not in the multiplication table of 10.

Why? Tell your screen.

That's right.

Because we know that all multiples of 10 end in zero and 99 does not follow that pattern.

Good job.

Now moving on to our independent task.

What I would like you to do, is to explore the statements and to decide whether the statement are always, sometimes or never true.

Okay? So let's read them together.

"multiples of five end in five" "multiples of two are also multiples of five" "multiples of five are odd" and "multiples of 10 are also multiples of five" Pause the video now and complete your task.

Great job.

So let's have a look at the answers together.

The first statement, "multiples of five end in five" Is this always, sometimes or never true? Okay? I know that my multiples of five end in zero or five.

Okay? And the statement says, "multiples of five end in five" they sometimes do, not always.

Because some end in zero.

Good job.

"Multiples of two are also multiples of five" Again, like we discussed earlier, not all multiples of five are multiples of two as well.

We know that the ones end in five do not fit into the multiplication table of two.

Good job.

"multiples of five are odd" again, we know that this is sometimes true.

Because in the multiplication table of five some end in zero and you know that, that is not an odd number.

Great job.

And "multiples of 10 are also multiples of five" and again, we know that this is always true.

Okay? Because multiples of 10 end in zero.

And we know that multiples of five also end in zero.

And if you'd like to, please ask your parent or carer to share your work on twitter tagging @OakNational and #LearnwithOak.

And now its time for you to complete your end of lesson quiz Bye.