Hi, I'm mrs.. Weiss, and today. I'm going to show you how to do a vertical number line
To round a number so say that I had the number
4825 and I wanted to round that number to the nearest thousand
My first step that I always tell my students to do is round. What place we're going to so we're going to thousands place, so
I'm going to circle the thousands place, so
I know that this number is what I'm going for
so between
4,000 and the next number up the next
Thousands place up would be 5,000 so I'm going to make those my top and bottom
endpoints on my number line, so
We've got 4,000 on the bottom
5,000 on the top
Now I need to find a middle point. What is my middle number between 4,000 and 5,000 well?
there's 1,000 different half of a thousand is 500, so
500 would be my middle point
I know anything that goes above this point is gonna round up anything that goes below this point is Gonna ground down
So I've got the number 4000 825
825 is bigger so it's going to be up here
We haven't been very specific on oh it needs to be exact
We just kind of guess and we know that it's above it. So we know that this number is going to round up to
5,000
So that is how we use a vertical number line to round?
And I just think it's a really
visual way for students to see if it runs up for sure or if it rounds down, and it's just
It's one of those new strategies that we have learned with our new curriculum
And it's been really exciting to see some of these cool strategies
So thank you so much, and I hope this helps you out at home as you're helping your students
