Step by step
The question
Question: put 7,654, 7,645, 7,564, 7,546 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
7,654 and 7,645 are the same in the first 2 places.
Look at the tens: 5 is more than 4.
So 7,654 is greater than 7,645.
7,645 and 7,564 are the same in the first place.
Look at the hundreds: 6 is more than 5.
So 7,645 is greater than 7,564.
7,564 and 7,546 are the same in the first 2 places.
Look at the tens: 6 is more than 4.
So 7,564 is greater than 7,546.
3 Write them in order
From least to greatest: 7,546 < 7,564 < 7,645 < 7,654.
4 Check
On a number line, smaller numbers are to the left.
Left to right: 7,546, 7,564, 7,645, 7,654.
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.