KS1 / KS2 Maths: Calculations - Counting in multiples

Voiceover:
In a world without maths,a land where people forgot, who will save the day?

Narrator:
Whether multiplying or dividing, skills like counting in twos, fives and tens are vitally important. Today we get a rare glimpse, behind the scenes to find out how Multiplication Boy and Divider Girl train. Keeping their super powers sharp takes work. Armed with their hundred grids they compete head to head in a secret mission, to see who can count the highest in multiples. It’s training time!

(Three Beeps)

Narrator:
Round one, counting in twos.

Narrator:
Divider Girl is the first one to stop. She’s looking for something that comes in twos.Good thinking Divider Girl, rabbits’ ears. Let’s see how many there are.One 2 is 2, two 2s equal 4, three 2s are 6, four 2s that’s 8…I think that’s your lot Divider Girl.Checking to make sure all the numbers are even?

Let’s see how Multiplication Boy’s getting on. Multiplication Bo…? Oh. Ahh, Multiplication Boy is countingsocks. Let’s see what he’s got. Every number in the two times table is even. How high can we go?

One 2 is 2, two 2s are 4, three 2s are 6, four 2s are 8, five 2s are 10, six 2s are 12, seven 2s are 14, eight 2s are 16, nine 2s are 18, ten 2s are 20! Wow, let’s check thepattern. 2, 4, 6, 8, 10, 12, 14, 16, 18, 20. All even numbers and no odd ones. Excellent, that looks good to me.Multiplication Boy wins round one.

Round two, counting in fives.

Looks like Multiplication Boy’s got a plan, but what’s he up to?Counting toes, that’s a great idea. How many can he find? One 5 is 5, two 5s are 10, three 5s are 15, four 5s are 20 he’s on a roll, five 5s are 25 anymore?..six 5s are 30…that’s all the toes in this pool.Great work. Let’s find Divider Girl.

Here she is but what’s she up to?..She’s not doing anything. Come on Divider Girl, Multiplication Boy’s going to win.Oh smart move! She’s counting fingers and thumbs.

One 5 is 5, two 5s are 10, three 5s are 15, four 5s are 20, five 5s are 25, six 5s are 30, seven 5s are 35, eight 5s are 40, nine 5s are 45, ten 5s are 50.

How does the pattern look? For multiples of 5 the answer ends in 5 or 0. So the pattern reads 5, 0, 5, 0, 5, 0 and so on.Wow she’s nailed it. Divider Girl wins round two.

Round three, counting in tens.
One 10 is 10.
Two 10s are 20.
Three 10s are 30.
Four 10s are 40.

Hang on, what’s going on…oh my, wow, they’re both counting the same thing, this is going to be close.Five 10s are 50, six 10s are 60.

Seven 10s are 70, eight 10s are 80, nine 10s are 90.

Mrs Barker:
Oh now where’s that barcode gone? This is a tricky one…Are you sure you want this? You’ve got quite a lot already…oh here it is.

Narrator:
Ten 10s, one hundred!

They’ve both won, woohoo!

Don’t forget to check the pattern, do they all end in zeros? 10, 20, 30, 40, 50, 60, 70, 80, 90, 100. Well done.Time to put that training into action you two, somebody needs your help.