Lesson video

Hello, everyone and welcome to Maths with Ms.Dobrowolski.

In today's lesson, we'll be using length, weight, and volume.

Let's have a look at today's lesson agenda.

First, we'll look at Finding the Difference.

Then, we'll be Solving Problems Involving Measure.

Then, you'll be ready for your Independent Task.

And finally, you'll have your final quiz.

For this lesson, you will need, a pencil and notebook.

If you don't have these items, pause the video now and go get them.

Super! So let's review finding the difference.

I did the first one, as usual.

So, I wanted to find the difference between the circled numbers.

One and eight.

So I drew jumps to find the difference.

One, two, three, four, five, six, seven.

I drew seven jumps.

That means the difference between one and eight is seven.

So, your turn.

Find the difference between the circled numbers on the number lines.

And then, you can resume the video when you're ready.

Pause now, complete the activity.

Super! So, let's go over the answers.

So the difference between nine and 16, should have been seven because you would have drawn seven jumps.

One, two, three, four, five, six, seven.

And again, the difference between four and 11 should also have been seven.

One, two, three, four, five, six, seven.

Did you spot the pattern? Every single time, the difference was seven.

There are other numbers where you can- you can recreate that pattern with.

I'm thinking two and nine the difference between two and nine is seven.

The difference between three and ten is also seven and so on and so forth.

So, let's do some problem solving.

This gingerbread man is four units tall.

One, two, three, four.

This gingerbread man is taller.

He is double the height of the smaller gingerbread man.

So, how tall is the tall gingerbread man? And how do you know? If you think you know how to solve this, pause the video now and resume when you have an answer.

If you're not too sure, just stay on with me and we'll talk through it together.

So, what do we know? We know that the small gingerbread man is four units tall and the larger, taller gingerbread man is double the height of the smaller one.

Okay, so that must mean, the taller gingerbread man is double four because he is double the height.

So, the large gingerbread man is eight units tall and I know this because double four is eight.

Super! Let's try another one.

Which of these containers is one quarter full? Again, if you know the answer, pause here and write your answer down.

If you're too not sure, just stay on with me and we'll talk through it together.

So, which one of these containers is one quarter full? Well, first, we need to think, "Well how many quarters do I need to make a whole?" Do you re- do you know? It's four quarters to make a whole so one quarter I need, let's see.

In this first one, it looks like the whole is full, so that can't be it.

And then in this one we have one, two, three, four quarters, but two of them are full.

I only want one quarter.

Let's see here.

One, two, three, four quarters and one quarter is full, so this last container is one quarter full.

Let's try another one.

So, which of these fruits is the heaviest? Which is the lightest? And explain how you know.

Again, if you know how to find the answer, pause the video now and do that.

Resume when you're ready.

If you're not too sure, just stay on with me.

So which of these fruits is the heaviest? Well I know when I'm looking at scales, the heavier item will go lower, and the lighter item will be a bit higher.

So, which of these fruits is the heaviest? Well, I can see here, that the banana is heavier than the pear and here the orange is heavier than the pear.

So now I need to compare the banana and the orange cause I know they're both heavier than the pear and it looks like the orange is heavier than the banana.

So that means the orange must be the heaviest.

Now let's look for the lightest.

I know that the banana is lighter than the orange.

Hmm, but the banana's also heavier than the pear.

So that must mean, if I know that the orange is already the heaviest, and the banana is heavier than the pear, then that must mean the pear is the lightest.

Super! It's already time for your independent task.

So, what I'd like for you to do here is to read each question and use your problem solving ability to solve them.

Remember, read the question carefully.

Make sure you identify what you know and what you need to know, and then, when you're ready, you can resume the video and we'll go over the answers together.

So pause now, and ill see you when you're finished.

Good luck! Super! Let's go over the answers together.

So in number one, the woman makes some gingerbread men.

Ten are short and ten are tall.

How many does she make altogether? Well, I know she makes ten short and ten tall, but I need to figure out how many she made altogether.

So I need to add.

Ten short plus ten tall is equal to 20 altogether.

In number two, the short gingerbread men, are five units tall.

The tall gingerbread men are double the height of the short gingerbread men.

How tall are the gingerbread men? Well, if I know the short gingerbread Men are five units tall, and the tall ones are double that, that means I need to double five.

Double five is ten.

The tall gingerbread men are ten units tall.

In number three, the man drinks half a glass of water with his gingerbread.

How much is half a glass? Well, I know that this first one is a full glass because it's completely full and here in this second one, it's actually a little bit less, it's actually quite a bit less than half full half full.

So it looks like this last one is even, it's half full and half empty.

If I cut the glass in half right here, both pieces would be the same size.

It'd be half full and half empty.

Good job everyone! So, if you'd like to, you can share your work with Oak National by asking your parents or carer to share your work on Instagram, Facebook or Twitter tagging @OakNational and hashtag LearnwithOak.

As always, don't forget to complete your quiz, and I really hope to see you again for future lessons.

Good job, everyone!.