1. Compare and Order Numbers
By Risa Udell

2. “Is Less Than” and “Is Greater Than” Symbols
We have been writing equations to show that two expressions have the same value.
2 + 3 = 5 Or
6 = 4 + 2

3. “Is Less Than” and “Is Greater Than” Symbols
We’ve also learned symbols for “Equal to” and “Is Not Equal to”

4. “Is Less Than” and “Is Greater Than” Symbols
Today we’ll learn the symbols for “Is Less Than” and “Is Greater Than”.

5. “Is Less Than” Symbol
= 14
Lydia has 14 dollars, and Harry has 14 dollars. The = symbol tells us that the numbers are the same.

6. “Is Less Than” Symbol
Now, Lydia has 14 dollars, and Harry has 18 dollars. 14

7. The numbers are not equal anymore.
“Is Less Than” Symbol
Now, Lydia has 14 dollars, and Harry has 18 dollars. 18
The numbers are not equal anymore.
Which number is less?

8. “Is Less Than” Symbol
14 < 18
small part of symbol

9. “Is Less Than” Symbol What other numbers are “Less Than” 18?
___ < 18
“ _____ is less than 18”

10. “Is Greater Than” Symbol
Suppose that Lydia has 18 dollars and Harry has 14 dollars. 14
Which number is greater?

11. “Is Greater Than” Symbol
Suppose that Lydia has 18 dollars and Harry has 14 dollars.
>
“ 18 is greater than 14.”

12. “Is Greater Than” Symbol
Any comparison can be written in two ways. 12
12 < 15
12 is less than 15
15 > 12
15 is greater than 12

13. Compare Other Pairs of Numbers
Write an “is greater than” and “is less than” statement.

14. Before, After, Between
Write the numbers 1 – 18 on your Math Board. Write the number that is “just before” 12. Hold it up.

15. Before, After, Between
Erase that number. Write the number that is “just after” 12. Hold up your board.

16. Before, After, Between
Erase that number. Write the number that is “between” 11 and 13. Hold up your board.

17. Least to Greatest
Let’s count from 1 to 10.

18. Are these numbers in order from
Least to Greatest
Are these numbers in order from
least to greatest?

19. Greatest to Least
Let’s count backward from 10 to 1.

20. 5 9 3 Are these numbers in order from greatest to least?

21. Great Job Today!