Which purse has a greater value of money?

Counting money in a set of coins

Key Stage 1

Maths

Money

﻿Hello, everyone, and welcome to maths with Ms. Dobrowolski. Today, we'll be counting money in a set of coins. Here's our lesson agenda. First, we'll be counting money with the same coins. Then we'll be having our talk task, and then we'll be counting money with different coins, followed by our independent task. So well done on you for making sure to watch this video today. It's really nice to see some familiar faces and some new ones. So for today's lesson, you will need a pencil, a notebook or something to write on, and possibly some coins or notes. Make sure you ask an adult for help to get some coins or notes. If you don't have coins or notes, that's completely fine. They are not necessary for you to have in order to be successful in this lesson. So if you don't have these items, pause the video now and go get them. Great, so let's start off by counting money with the same coins. As you can see, I have two purses, and in each purse I have some coins. How many coins are in each purse? Well, let's count. Make sure you're counting with me. One, two, three, four, five, six, seven, eight. Okay, so in this first bag of mine, I have eight coins. Let's count the second bag. Count with me. One, two, three. I only have three coins in this bag. Let's look a little bit more closely. What is the value of each coin? Hmm, it looks like all of the coins in this first bag have a value of two pence because it says on the coin two pence. In my other bag on the right, it looks like each coin has a value of 10 pence. Now, knowing that, which bag has a greater value of money? we know that this first purse had more coins. It had eight coins. But just because something has more coins doesn't mean it has a greater value. That's why we have to look at the value of each coin. So to figure out which bag has a greater value of money, we're going to skip count. So let's skip count by the value of the coin in the bag. Make sure you're counting with me. We're going to skip count by twos. Ready, and 2, 4, 6, 8, 10, 12, 14, 16. So in this first bag, I have 16p. Okay, let's do the next bag. Ah, so here we said our value of each coin was 10p, so we're going to skip count by 10. Make sure you're counting with me. Ready, and 10, 20, 30. I have 30p in this bag. Ah, so which bag has a greater value of money, the one with 16p or the one with 30p? Well, I know that 30 has a greater value than 16, so the bag on the right with 30p has a greater value than the one with 16p. Well done. Let's move on. Okay, now it's time for our talk task. I want to know how much money is in each purse. We'll do this first one together before you go off on your own, so that way you're really clear on what to do. Step one is to count the coins. So this purse has one, two, three coins. Step two is to skip count by the value of the coin. So I can count in, ah, 10s to find the total because that's the value of each coin. So there is 10, 20, 30 pence in total. Now, make sure that you are saying these sentences out loud and you are saying the whole sentence. It's really important we're using mathematical language in our talk tasks. So your turn. Pause the video. Find out how much money is in each purse, and then when you're ready you can resume the video, and we'll go over the answers together. So pause the video now. Great, so hopefully you've completed your talk task and you're ready to share the answers with me. So this first purse we discovered had... There's a total of 30 pence, and that's because this purse had one, two, three, four, five, six coins in it. And we discovered that I can count in fives to find the total. So I skip counted 5, 10, 15, 20, 25, 30. There is 30 pence in total. In this purse, let's count how many coins. One, two, three, four, five, six, seven, eight. This purse has eight coins in it. I can count in twos to find the total. So there is 2, 4, 6, 8, 10, 12, 14, 16 pence in total. This purse has one, two, three, four coins in it, and we can count in fives to find the total. So there is 5, 10, 15, 20 pence in total. And onto the next purse. This purse has one, two, three, four, five, six, seven, eight coins in it. And I can count in 10s to find the total. So there is 10, 20, 30, 40, 50, 60, 70, 80 pence in total. And last but not least, this purse has one, two, three, four, five coins in it. I can count in twos to find the total. So there is 2, 4, 6, 8, 10 pence in total. Well done, everybody. Okay, hmm, now we're going to move on and make it a little bit trickier. We're going to be counting money with different coins, but before we get to that, let's have a look at my purse. I have two coins in my purse. How could we count this money? I have a 20 pence and a 20 pence coin. Is there a number fact that might help us count it? Well, I discovered that two doubled is four, so that means 20 doubled must be 40. 20 plus 20 is 40. Or you may have discovered that you could count by twos, two, four, six, eight. So counting in 20s would go 20, 40, 60, 80. 20, 40, so I have 40p in my purse. Now, here I have two purses. What's the same about the purses? Have a think for five seconds, and then I'll tell you what I found. So have a think. What's the same about each purse or in each purse? Hmm. Well, in each purse, I can see that I have two 20 pence coins, 20 and 20 and 20 and 20. Now, what's different about the second purse? Have a think. What's different? Ah, you guessed it. There is a 10p coin. So not only is there an additional coin in the second purse, but that coin has a different value. It's only 10p, not 20p. So how much money do I have in total now in this bag? Well, let's count. 20 plus 20 is 40. 40 plus 10 is 50. I have 50p in my bag. Well done. Now, if I want to count money with different coins, I have to look at a couple of things. So let's one more time look at this new purse. What's the same? What's the same in this purse? Have a think. Ah, I can see that I have two coins here that are the same, a 20p and a 20p, and I have two coins here that are the same, a 5p and a 5p coin. But what's different? Hmm, I can see that I have a 10p coin here, and it's not like any of the other coins. So in order to count the coins in this purse, there's some steps that I can take. Hmm, you have a think first while I have a think about what steps I'm going to take. How would you count this money? Where would you start? Have a think. Well, if I was going to count the money in this purse, this is what I would do. Step one is to count the coins with the greatest value first. You always want to start with the greatest value because that will make skip counting much easier. So in my purse, I can see that my 20p coins have the greatest value. So I would start with 20 plus 20 being 40. Once I did that, then I'd move on to my 10p coins, and then I'd add my 5p coins. It's also really helpful to identify the coins you can easily combine. So I saw that I had two 20p coins, so I was going to combine them first. I also saw that I had two 5p coins, so I would combine them together as well. I would start with my 20p, move on to my 10, and then make sure I counted my fives last because they're both the same. And then finally, you add all the coins together. So let's follow my steps and figure out how much money I have in my bag. 20 plus 20 is 40. 40 plus 10 is 50. 50 plus 5 is 5. And 55 plus 5 is 60. Now I have a new purse. How much money do I have in total now? Well, I know that 50 plus 50 is equal to 100. What is 100p equal to? Do you remember? Hmm, 100p is equal to one pound. So every time we get to 100p or we make 100p, we can just call it one pound. So how much money do I have in my purse? Well, I need to remember that 100p is equal to one pound. So let's follow the steps that we took before and count our money. We'll start with the greatest value. 50 plus 50 is 100. Ah, remember, once I get to 100, I don't keep counting. I just know that that's one pound. So I'm going to write down my one pound. So I've counted my two 50s. I'm done with those. I know they make one pound. So now I'm going to move on to my next set of coins, okay? 10 plus 10 is 20p, and 20 plus 2 is 22. So in my purse, I have one pound and 22 pence. Well done, everyone. Okay, everyone, it's time for your independent task. Before you go off on your own, let's do one together so we're all on the same page about what to do. For this independent task, you'll have to decide, is the price tag on each purse or the price label on each purse true or false? And in order to determine that, you'll have to take a couple steps. Step one, add the values of the coins in each purse. So for example, 20 plus 20 is 40, and 40 plus 5 is 45. Is the value on the label true or false? Well, it has to be false because 45p is not equal to 41p. If the value is false, make sure to write the correct value. So in step three, I would just write 45p because that is the correct value. So there's three steps here. Make sure you follow each step so that you're successful, and make sure to pause the video to complete your task. Once you're finished, resume the video, and we'll go over the answers together. Good luck. Great, so hopefully you've paused the video, completed your independent task, and now you're ready to go over the answers. So we knew that the first purse was false. Let's look at the second one. So first we add the value. 10 plus 10 is 20. 20 plus 5 is 25. Is the label true or false? Ah, it's true because 25p is equal to 25p. Moving on, let's add the value of the coins. 50 plus 20 is 70. 70 plus 20 is 90. 90 plus 5 is 95. So this is true because 95p is equal to 95p. Moving on, let's add the values. 20 plus 10 is 30. 30 plus 5 is 35. 35 plus 5 is 40. This is true because 40p is equal to 40p. Moving on, let's add the values of these coins. 20 plus 5 is 25. 25 plus 2 is 27. 27 plus 2 is 29. And 29 plus 1 is 30. Hmm, so is this label true or false? Well, this must be false because 30p is not equal to 35p. So here I write false and my correct answer of 30p. Let's move on. Okay, let's add the values. 50 plus 20 is 70. 70 plus 20 is 90. 90 plus 10 is 100p or one pound. Is one pound equal to 90p? No, it is not, so this would be false, and I write my one pound. So well done, everyone. This was a really, really good effort on your part. Now, if you'd like to, you can share your work with Oak National by asking parent or carer to share your work on Twitter, tagging @OakNational and #LearnwithOak. Make sure you complete your quiz before you end this video. It was really great to see you, and I hope to see you for the next lesson. Well done, everyone. Bye, and see you next time. Don't forget your quiz.

Counting money in a set of coins

Counting money in a set of coins

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UnitMaths / Money

Maths