Order 128, 821, 218

Step by step

The question

Question: put 128, 821, 218 in order, from least to greatest.

1 Line up the places

We line up the ones under the ones, the tens under the tens, and so on.

2 Compare from the left

Look at the hundreds: 8 is more than 2.

So 821 is greater than 218.

Look at the hundreds: 2 is more than 1.

So 218 is greater than 128.

3 Write them in order

From least to greatest: 128 < 218 < 821.

4 Check

On a number line, smaller numbers are to the left.

Left to right: 128, 218, 821.

The same order.

Yes!

It works.

Let's look back.

First: line up the places.

Then: compare from the left.

Then: write them in order.

Last: check.