Here is a number line with 60 and 70 marked on it, and 67 sitting between them. Have a look: is 67 nearer to 60, or nearer to 70? How can you tell just by where it sits on the line?

The interactive shows each number as a marker between two tens. Look at where each marker sits and decide which ten it is closer to. One of them sits exactly halfway — think about what should happen then.

Today we work through these numbers together on the number line: 52, then 46, then 85, then 91. For each one we say the two tens it sits between, drag the marker to it, and read off the nearer ten. Watch 85 carefully — it is a halfway number, so remember our rule.

Now we round these on the board, one at a time: 34, then 85, then 1,256, then 3,995. The last one is the tricky one, so watch carefully what happens to the digits.