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This will help you with the counting money worksheet :)

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- Let's get some practice counting money! So I have six coins right over here, and these are all United States coins, we're counting money in the United States for these examples, and what is this first coin? Well, this is called a quarter, or a quarter-dollar, so it represents 25 cents, and we could write it out as 25 cents, but I'll just keep that one like that. Now this one's another quarter, so it is also going to be 25 cents. Now this one looks different, but it's just the other side of these coins. This is what the other side looks like. So this is also going to be 25 cents. These are three quarters right over here. So how much money do these three quarters represent? Well, it's going to be 25 plus 25, which is 50, plus 25, which is going to be 75, so these three quarters are going to be 75 cents. And remember, 100 cents make a dollar, so this is still less than one dollar. But we're not done yet. We have this nickel, this is a nickel right over here, that represents five cents, and then we have another nickel here, it looks different, but it's just the other side, this is the head side, this is the tail side. So this is also another five cents, and so these two nickels, if you add them together, they are going to represent 10 cents, and then finally, you have a penny, and a penny, and it even says it right over here, is one cent, in fact, they all say it here, this is five cents, this is one cent. So this right over here's gonna be one cent. So what is 75 plus 10 plus 1? Well 75 plus 10 is 85, plus 1 is 86, so this is equal to 86 cents. And if it felt a little bit too fast to count up 25, 50, 75 in your head, you could also add them up. 25, 25, 25, plus 5, another 5, plus 1. You could add them up this way, and then what would you get? 5 plus 5 is 10, plus 5 is 15, plus 5 is 20, plus 5 is 25, plus 1 is 26, so that's two tens and one six, put the two tens up here. 2 plus 2 is 4, 4 plus 2 is 6, 6 plus 2 is 8. So you could get 86 cents, either way. Let's do one that has even more coins in it. So here we go, we have, so what is it, what's going on here? This right over here is a quarter, that's going to be 25 cents. 25 cents, and then, we have one that we didn't see in the previous example, we have two dimes. A dime represents 10 cents, so we have two dimes, where we can have those each represent 10 cents, then we have two nickels, we've already seen those each represent five cents, so 5 and 5, and then we have four pennies, one, two, three, four. Now we could put each penny separately, like that, or we could say, look, four pennies, each of them represent one cent, so that's going to be four cents. So let me do it that way. So, this one, two, three, four, that's going to be four cents. And then we could just add everything up, so 5 plus 0 plus 0 plus 5 is 10, plus 5 is 15, plus 4 is 19. 19 is one ten and nine ones, so I could put the one ten in the tens place, 1 plus 2 is 3, plus 1 is 4, plus 1 is 5. So it's five tens, five tens and nine ones, so 59 cents. This right over here is 59 cents. And notice, we have more coins, but it represents less value than the previous example. That's because we had a lot of coins that didn't represent a lot of values, like, we had these four pennies here, while the previous example, we had three quarters! Each of these quarters is equivalent to 25 pennies, so we're able to represent more money with fewer coins in the first example.

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Counting American coins (video) | Khan Academy

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Let's get some practice counting money! So I have six coins right over here, and these are all United States coins, we're counting money in the United States for these examples, and what is this first coin?

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Determine the value of a collection of coins and bills

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Determine the value of a collection of coins and bills

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Please pick at least 4 questions to solve and post your answers on the comment section.

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Round these numbers to the nearest 10. Post your answer on the comment section.

34-

86-

72-

91-

27-

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652-
720-
889-
210-
371-

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We're asked to round 152, 137, 245, and 354 to the nearest 100, which is another way of saying round each of these numbers to the nearest multiple of 100. So let's think about them one by one. So let's draw a number line here. And here I'm counting up by hundreds. What I've marked here, 100, 200, 300, 400, these are all multiples of 100. I could keep going up. I could go to 500, 600, so on and so forth. Now, let's start with 152. Well, where does 152 sit? So halfway in between is 150. 152 is going to be right to the right of that. So that's 152 right over here. So what are our two options? We might round up. The multiple of 100 above 152 is 200. The multiple of 100 below 152 is 100. So which direction do we go in? Do we round up to 200, or do we round down to 100? Well, if we're rounding to the nearest 100, we want to look at one place to the right of that. We want to look at the tens place to decide which multiple of 100 it is closer to. And the rules are very similar to when we're rounding to the nearest tens place or really any place. We look one place to the right of it. So in this case, we look at the tens place. And we say, if this is 5 or larger, we round up. And this is 5 or larger, so we're going to round up to 200. So this we're going to round. 152, we're going to round to 200, which also makes sense. 152 is a little bit closer to 200. It's 48 away from to 200 than it to 100. It's 52 away from 100. So it makes sense to go up to the nearest multiple of 100. Now, let's think about 137. And I encourage you to now pause the video and try to round each of these other three numbers to the nearest 100. Well, 137 is going to sit someplace right over here. 137 is going to be right over there. So two options-- we can round down to 100. That's the multiple of 100 below 137. Or we could round up to 200. Well, 137, just looking at it, is clearly closer to 100. Or we could apply our rule. If we're rounding to the nearest 100, we want to look at one place to the right of that. We want to look at the tens place. If this is 5 or larger, we round up. If it's less than 5, we round down. So in this case, we would round down to 100. Let's do the same thing with 245. If you haven't paused it and tried it yourself, once again, I want to emphasize. That'll make it really valuable for you to try it on your own. So let's plot where 245 is. So 245 is right around-- this is 250, so 245 might be right around here. Now, let's apply that rule. If we're trying to round to the nearest 100, we would look to one place to the right. We'll look at the tens place. We could ignore the ones place. We look at the tens place here. If it is greater than or equal to 5, we round up. If it is less than 5, we round down. So here, we're clearly going to round down. And when we round down, we're going to round down to the multiple of 100 that's directly below 245. Well, we're going to round down to 200. We had two options. If we rounded up, we would have gone to 300. If we rounded down, we would go to 200. We're clearly closer to 200. And we can verify that with the rule. The tens place, we're in the 40's here. The tens place is a 4. We're going to round down. Now let's think about 354. If we were to plot that, this is 350. 354 might be right over here. So if we rounded down, we would go to 300. If we rounded up, we would go to 400. Now let's apply our rule, and let's also think about it on the number line. This is all about finding the multiple of 100 that it's closest to. If you're trying to round to the nearest 100, you want to look at the tens place, a place to the right of the place you're rounding to. If the tens place is a 5 or larger, you're going to round up. This is a 5 or larger so we're going to round up to 400. And that also makes sense. The rule is really valuable. If you're right at 350, right in between, then you would need the rule to say, hey, let's look at this 5 and round up. But 354 is also closer to 400 than it is to 300. It's 54 away from 300. It's 46 away from 400. So it makes sense that we would round up to 400.

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Rounding to nearest 100 (video) | Khan Academy

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We're asked to round 152, 137, 245, and 354 to the nearest 100, which is another way of saying round each of these numbers to the nearest multiple of 100. So let's think about them one by one. So let's draw a number line here. And here I'm counting up by hundreds.

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Compatible numbers to estimate solutions 

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Compatible numbers to estimate solutions 

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Pick at least four questions to solve and post your answers on the comment section. I will post some review links to help you with these questions. Use the examples we did in class to help guide you.

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round to the nearest 10 or 100 or use compatible numbers to estimate solutions to addition and subtraction problems;