Question Video: Representing Three-Digit Numbers on Number Lines | Nagwa Question Video: Representing Three-Digit Numbers on Number Lines | Nagwa

# Question Video: Representing Three-Digit Numbers on Number Lines Mathematics

What number is missing from the number line?

01:54

### Video Transcript

What number is missing from this number line?

We’re given a number line here, which is just a line with lots of numbers written in order. And we’re asked, what number is missing from the number line? Now, to find the answer, we need to do two things. Firstly, we need to look at where the missing number is. And then once we’ve done that, we need to think carefully about what the number line shows.

Now, our missing number is here, isn’t it? That’s why we’ve got this empty box. It’s the number that comes after 913 but before 915. In fact, we could say it’s in between 913 and 915. Now that we’ve looked at the position of our missing number, let’s look at the whole number line. What do we notice? We can see that it starts with the number 900. It goes all the way up to 920. And if we count along the number line, we can see that we’re counting in ones. 900, 901, 902, 903, and so on. We could say that the scale of this number line is to count or jump in ones each time.

So if we come all the way across now and look at our missing number, we know that it’s going to be one more than 913. We know that one more than 13 is 14. And so one more than 913 is 914. And if we count the numbers around our missing number, we can see that it fits in perfectly. 913, 914, 915, and so on. The number line shows a scale where we’re counting in ones. And we know then that our missing number is going to be 914.

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