Step by step
The question
Question: put 645, 564, 456 in order, from greatest to least.
Order 645, 564, 456
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: 6 is more than 5.
So 645 is greater than 564.
645 > 564
Look at the hundreds: 5 is more than 4.
So 564 is greater than 456.
564 > 456
3 Write them in order
From greatest to least: 645 > 564 > 456.
= 645 > 564 > 456
4 Check
On a number line, smaller numbers are to the left.
Left to right: 456, 564, 645.
The same order.
Yes!
It works.
left to right: 456, 564, 645
Let's look back.
First: line up the places.
Then: compare from the left.
Then: write them in order.
Last: check.
Answer
= 645 > 564 > 456