The question
Question: compare 352 and 325.
Compare 352 and 325
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
352 and 325 are the same in the first place.
Look at the tens: 5 is more than 2.
So 352 is greater than 325.
352 > 325
3 Write it with a sign
So 352 > 325.
= 352 > 325
4 Check
On a number line, smaller numbers are to the left.
Left to right: 325, 352.
The same order.
Yes!
It works.
left to right: 325, 352
Let's look back.
First: line up the places.
Then: compare from the left.
Then: write it with a sign.
Last: check.
▶ Watch it solved
The question
Question: compare 4,099 and 4,109.
Compare 4,099 and 4,109
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
4,109 and 4,099 are the same in the first place.
Look at the hundreds: 1 is more than 0.
So 4,109 is greater than 4,099.
4,109 > 4,099
3 Write it with a sign
So 4,099 < 4,109.
= 4,099 < 4,109
4 Check
On a number line, smaller numbers are to the left.
Left to right: 4,099, 4,109.
The same order.
Yes!
It works.
left to right: 4,099, 4,109
Let's look back.
First: line up the places.
Then: compare from the left.
Then: write it with a sign.
Last: check.
▶ Watch it solved
The question
Question: put 999, 1,001, 990 in order, from least to greatest.
Order 999, 1,001, 990
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
1,001 has more digits than 999.
More digits means bigger.
So 1,001 is greater than 999.
1,001 > 999
999 and 990 are the same in the first 2 places.
Look at the ones: 9 is more than 0.
So 999 is greater than 990.
999 > 990
3 Write them in order
From least to greatest: 990 < 999 < 1,001.
= 990 < 999 < 1,001
Careful!
999 has big digits, but fewer of them.
A number with more digits is bigger.
Careful: more digits = bigger number
4 Check
On a number line, smaller numbers are to the left.
Left to right: 990, 999, 1,001.
The same order.
Yes!
It works.
left to right: 990, 999, 1,001
Let's look back.
First: line up the places.
Then: compare from the left.
Then: write them in order.
Last: check.
Answer = 990 < 999 < 1,001
▶ Watch it solved
