WEBVTT
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Counting Forward to 10
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In this video, we’re going to be learning how to count in ones from zero to 10.
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And we’re also going to use this skill to help us find missing numbers when we’re counting in a sequence.
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This cube represents the number zero.
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Can’t you see a cube?
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That’s because there isn’t one.
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Zero, of course, means nothing.
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Now, we have one cube.
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And if we make our line of cubes one more each time, we can count forwards in ones.
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Let’s start with the two numbers we’ve said already.
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Zero, one, two, three, four, five, six, seven, eight, nine, 10.
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We’ve counted forwards in ones all the way from zero to 10.
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We used the cubes to help us here.
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We know we can count forwards to 10 without having a set of objects to count.
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This is a number track.
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It shows the numbers from zero to 10 in order.
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And it helps us remember where each number belongs.
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And because we know where each number belongs, we can use what we know to solve missing number problems.
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Which number is missing?
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We can see that it’s the number that comes after five.
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Zero, one, two, three, four, five — and what number comes next?
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— six.
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Let’s practice using our knowledge of the counting sequence from zero to 10 and finding out some missing numbers.
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Elizabeth counts the steps as she climbs.
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Which number will she finish on?
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Which number has she missed out?
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In the picture, we can see that Elizabeth is climbing a set of steps.
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And we’re told that she counts the steps as she climbs them.
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Perhaps this is the sort of thing you’ve done at home to see how many there are.
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The first part of this question asks us, which number will she finish on?
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In other words, which number will she say when she reaches the top step?
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Every step she takes, she says one more number.
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Let’s imagine that we’re climbing these steps.
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And we’ll count forwards one for each step that we stand on.
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One, two, three, four, five, six, seven, eight.
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There are eight steps.
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This means that the number that Elizabeth will finish counting on is the number eight.
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In the picture underneath the second part of the question, we can see that Elizabeth has missed a number out as she climbs the steps.
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Here’s the missing number.
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What is it?
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We can use our knowledge of the counting sequence to count forwards and to work out what the missing number might be.
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One, two, three, four, five.
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We know the number after five is six.
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And then comes seven and eight.
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The missing number in the sequence is the number six.
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Our two answers are eight and six.
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What number is missing?
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Four, what, six, seven.
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We’re given a picture that shows a sequence of numbers.
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We can see these numbers shown as digits, four, six, and then seven.
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And underneath, we can see the same sequence shown in blocks, four blocks, six blocks, and seven blocks.
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But our sequence isn’t all it seems.
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There’s a missing number.
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If we count through the sequence, we can see four, then a big gap where our missing number belongs, and then six and seven.
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And the question asks us, what number is missing?
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In other words, what comes after four in our sequence?
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We’re given three possible answers to choose from.
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And we can see those over here.
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And if we look at these answers quickly, we can see which number is missing.
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But let’s work it out for ourselves.
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The only two numbers that are next door to each other that we know already are six and seven.
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And we know that if we count forwards in ones, we count from six to seven.
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Seven is the number that comes after six.
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And so, we know that our missing number must be the number that comes after four when we’re counting in ones.
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One, two, three, four.
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What comes next?
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Five, our missing number must be the number five.
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But if we look at our three possible answers, we can see that each one of them shows the digit five.
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How can we decide which one is correct?
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Well, we need to count the blocks underneath.
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We need to show five blocks to match our digit five.
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Let’s count each group of blocks.
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In the first group, we have one, two blocks.
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This doesn’t show the number five at all.
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Let’s try our second possible answer.
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In this one, we have one, two, three, only four blocks.
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Again, this is too small.
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It looks like our last answer must be the correct one.
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Let’s just count to make sure that there are five blocks.
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One, two, three, four, five blocks.
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Now, we think we’ve found our missing number.
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Let’s see whether our sequence makes sense.
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Four, five, six, seven.
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We’ve counted forwards in ones and we’ve found that our missing number was the number five.
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The correct answer is the one that shows the digit five and also five blocks underneath.
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Complete the following pattern: what, what, what, three, four, five, six, seven, eight, nine, 10.
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When we listened to that pattern, it sounded a little bit like we were counting to 10.
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But there were a few whats at the start, weren’t there?
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Some missing numbers.
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Let’s read our pattern again.
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What, what, what, three, four, five, six, seven, eight, nine, 10.
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Well, we’ve definitely heard the last part of our pattern before.
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These are definitely the numbers that we say when we’re counting forwards in ones.
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So our missing numbers must be the start of this pattern.
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What can we use to help us count forwards to 10?
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We could use a number track like this one.
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It shows all the numbers in order from zero all the way up to 10.
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Now, where’s our number pattern on this number track?
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Well, here is the number three.
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And after it comes the number four and so on.
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So we can use the number track to work out our missing numbers.
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If we’re counting forwards in ones, the number that we say before we say three is the number two.
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Two, three, four, five, and so on.
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And the number that we say before we say two is, of course, the number one.
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One, two, three, four, and so on.
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This means that our first missing member must be zero.
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Let’s check whether our completed pattern makes sense.
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And as we say each number, we’ll move a counter along our number track.
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Zero, one, two, three.
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Our first three digits fit perfectly with our pattern.
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Let’s finish it off, four, five, six, seven, eight, nine, and 10.
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We’ve used our knowledge of counting forwards to 10 to help us to complete the pattern.
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Our three missing numbers, in order, are zero, one, and two.
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So what have we learned in this video?
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Well, firstly, we’ve learned how to count in ones all the way from zero to 10.
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We’ve also learned that each number has a position where it belongs.
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And we’ve used things like number tracks to help us to learn these positions.
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Finally, we’ve used what we know about counting forwards to 10 to help find missing numbers.