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Comparing Groups by Counting up to 10
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In this video, we’ll learn how to compare two groups of up to 10 objects.
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And we’re going to do this by counting how many objects there are in each group.
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Many beasts are always good to count.
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Here we have two groups of many beasts.
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We have a group of snails and a group of wriggly earthworms.
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But which group contains the greatest number of many beasts?
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Which is the largest group?
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We can compare groups of objects or many beasts like this by using counting.
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First of all, let’s count up a group of snails.
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So that we know which snails we’ve counted, we could put an orange counter next to each one.
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There are one, two, three, four, five, six snails.
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To represent the number six, we could move our six counters and put them on a 10-frame.
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We’ve made a full row of counters with one extra counter underneath.
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Another way to show the number six and how many snails there are is using a number track.
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We could even draw an arrow to show the number of snails on our number track.
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We counted six snails.
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Now, let’s do the same with our earthworms.
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How many are there?
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We can count one, two, three, four, five, six, seven.
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There are seven earthworms.
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Let’s move our counters like before and model this number seven using a 10-frame.
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Just like the number six, we can see one full row of counters.
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But instead of one extra counter underneath, we now have two extra counters.
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There are more counters on this 10-frame.
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Seven is more than six.
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And you know we can show this on our number track too.
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When we’re counting from one to 10, we say the number seven after we say the number six.
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And this means that the number seven is a larger number.
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So, which group of many beasts is the largest?
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The worms are the largest group.
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We know this because the number seven is larger than the number six.
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It’s time to put into practice what we’ve learned.
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Let’s try some questions where we have to compare groups by counting up to 10.
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Count the carrots.
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Which group has the greatest number of carrots?
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In the picture, we can see two groups of carrots.
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And we know that we need to compare them because we’re asked, which group has the greatest number of carrots?
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In other words, which group has more carrots than the other one?
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How are we going to find the answer?
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Well, we’re told how to do so in the first sentence.
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We’re told to count the carrots.
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So, let’s do that.
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And as we count each number, we could put a counter on a 10-frame.
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10-frames can be a useful way to help us to compare numbers and to represent them.
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Let’s begin by counting our first group of carrots then.
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We can see one, two, three, four, five carrots in the first group.
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If we look at our 10-frame, the number five is shown by one full row of counters.
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Now, how many counters are in our second group of carrots?
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One, two, three, four, five, six.
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Our second group of carrots contains six carrots.
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Look how the number six is represented on a 10-frame.
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We have one full row of counters, just like before, but we also have another counter underneath.
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Six counters are more than five counters.
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This means we know that six carrots are more than five carrots.
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Six is more than five.
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Five is less than six.
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And so, the group that has the greatest number of carrots is the one that contains six carrots.
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Count the cupcakes.
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Which group has the least number of cupcakes?
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In the picture, we can see two groups of cupcakes.
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Perhaps they’re sitting on two trays at the baker’s.
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We’re asked to compare these two groups together because we’re asked, which group has the least number of cupcakes?
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In other words, which group contains less cupcakes than the other?
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We can compare two groups together by counting.
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And that’s why we’re asked to count the cupcakes.
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Let’s use a number track to help us count.
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We could move an orange counter along our number track as we count each cupcake in our first group.
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There are one, two, three, four, five, six, seven, eight, nine.
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Our counter has made it all the way along to number nine on our number track.
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We can say that there are nine cupcakes in the first group.
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How many cupcakes are there in the second group?
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We’ll use a different colored counter this time.
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There are one, two, three, four, five, six.
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There are six cupcakes in the second group.
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Now that we’ve counted both groups, we can answer the question.
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Which group has the least number of cupcakes?
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If we look at our number track, we can see that the number nine is further along than the number six.
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If we’re counting, the number nine comes a little bit after the number six.
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And we know that when we say a number after another number, it’s larger.
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So, we can say that nine is more than six.
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Six is less than nine.
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So, which group has the least number of cupcakes?
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It’s the group that contains six cupcakes.
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Six is less than nine.
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Which groups have the same number of fruits?
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When two groups contain the same number, we can say that they are equal.
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And this question is getting us to look at the groups of bananas and strawberries and to find which groups are equal, which are the same size.
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We’ve got three possible answers to choose from.
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Is it these groups?
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Or maybe these groups are equal?
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What about these groups?
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To find the answer, we’re gonna have to count the number of bananas and strawberries each time.
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Let’s start with our first pair of groups.
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How many bananas are there?
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We can count one, two, three, four, five, six bananas.
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Let’s write the digit six to remind us that there are six bananas.
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Now, let’s count the group of strawberries.
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We can see one, two, three, four, five, six.
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This is not gonna be the same number, is it?
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Seven, eight strawberries.
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The numbers six and eight are different.
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The groups don’t contain the same number of fruits.
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Six is less than eight.
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Eight is more than six.
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They’re not the same.
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Let’s try comparing our second pair of groups.
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First, bananas.
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There are one, two, three, four, five, six, seven, eight, nine, 10 bananas.
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We can write a one and a zero to show the number 10.
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How many strawberries are there?
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This looks very similar to the group of strawberries above.
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There are one, two, three, four, five, six, seven, eight.
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So, we have 10 bananas and eight strawberries.
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Do these groups have the same number of fruits?
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No, the number 10 and the number eight are different numbers.
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We know that eight is less than 10.
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10 is more than eight.
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These groups are not the same.
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There’s only one possible answer left.
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Let’s hope this pair of groups is the same.
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We can count one, two, three, four, five, six, seven, eight, nine, 10 bananas.
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Now, if our second group is the same, how many strawberries should there be in it?
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Well, we need that to be 10.
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Let’s count our strawberries.
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One, two, three, four, five, six, seven, eight, nine, 10.
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Look how the numbers are the same.
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We have 10 bananas and 10 strawberries.
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These groups are equal.
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The groups that show the same number of fruits are those that show 10 bananas and 10 strawberries.
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So, what did we learn in this video?
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We’ve learned how to compare groups of up to 10 objects.
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And the way we’ve done this is by counting the number in each group.