# Video: KS1-M16S • Paper 2 • Question 11

KS1-M16S-P2-Q11-702171938739

02:55

### Video Transcript

Use a ruler to measure the length of the toy car.

We’re told that we need to measure the length of the toy car. We can see that underneath the car is a line that we can use to help us. Each end of the line is level with each end of the car. So to find the length of the toy car, all we have to do is to measure the line. And we’re told that we need to use a ruler. So let’s get one.

Here’s a ruler that we can use. Our ruler measures centimetres. We can see the letters “cm” on it. And “cm” stands for centimetres. Our ruler goes up as far as 12 centimetres. So hopefully, the car isn’t longer than that.

First, we need to line the ruler up with the line that we’re measuring. We’ve lined one end of the ruler up with one end of the line. If we read the number that’s level with the other end of the line, we can see that it says 10 and a half centimetres. It’s halfway between 10 and 11. Is the answer 10 and a half centimetres?

No. Whenever we measure something, we need to start measuring from zero on the scale and look at where zero is. it’s not level with the end of the line. We need to move our ruler so that, instead of the end of the ruler being level with the end of the line, we need to make sure the number zero is level. This is better. We’ve moved the ruler so that zero on the scale is level with the end of the line. And we can start measuring from zero. This is the correct way to measure length.

If we read the number at the other end of the car, we can see that the length of the toy car is 11 centimetres. At the moment, you’re watching this on a video. So if you get a ruler out and try to measure the length of the toy car on the screen, it probably won’t be 11 centimetres long. It depends on the size of the screen. If you’re watching on a mobile phone, the length of the toy car is going to be smaller than if you’re watching on a large screen. If you or your teacher prints out the question, it should be the correct size.

Hopefully, the video has shown you how to measure correctly. Always line the ruler up with zero next to the end of the thing that you’re measuring. Don’t look for the end of the ruler. Look for the zero. We did that as we measured the car. And we found that the length of the toy car was 11 centimetres.