Step by step
The question
Question: compare 18 and 20.
Which is more?
Compare 18 and 20
1 Make two rows
2 Match them up
Match each red dot with a blue dot.
3 Write it with a sign
18 is less than 20.
We write 18 < 20.
18 < 20
The sign < means less than.
The sign > means greater than.
Greater means more.
The open side faces the bigger number.
< less than
> greater than
Careful!
The open side faces the bigger number.
20 is bigger.
Careful: not 18 > 20 ✗
4 Check
On the number line, bigger numbers are to the right.
Yes!
It works.
20 is right of 18
Let's look back.
First: make two rows.
Then: match them up.
Then: write it with a sign.
Last: check.
Answer
Careful: not 18 > 20 ✗