The document focuses on teaching how to write three-digit numbers in expanded form, illustrating the value of each digit. It provides objectives, examples, and practice exercises for converting standard form to expanded form. Students are encouraged to use whiteboards to practice writing numbers in both forms.

1. First Quarter
Tr. Eliza

3. Visualize and write three-digit numbers in
expanded form
Objectives:

4. Direction: Write these numbers in symbols.
a. Two hundred three
b. six hundred forty - nine
c. nine hundred thirty - two
203
649
932
Direction: Write these numbers in words.
a. 400___________________________
b. 546___________________________
four hundred
five hundred forty-six

5. Lesson 5: Numbers in Expanded
Form

6. Let Us Remember
▪ The expanded form of a number tells how many
hundreds, tens, and ones are in the number.
▪ The expanded form of a number gives the value
of each digit in the number.
▪ Writing number in expanded form is expressing
that the number as the sum of the values
of its digits.

7. What is Expanded Form?
A way to write numbers by showing
the value of each digit.

8. Example:
534
Standard form

9. 534
Standard form
Expanded form
_
500

10. 534
Standard form
Expanded form
_
500 30

11. 534
Standard form
Expanded form
_
500 30 4
+ + = 534

12. Example:
123
Standard form

13. 123
Standard form
Expanded form 100
_

14. 123
Standard form
Expanded form 100 20
_

15. 123
Standard form
Expanded form 100 20 3
+ + = 123
_

16. Example:
789
Standard form

17. 789
Standard form
Expanded form
_
700

18. 789
Standard form
Expanded form
_
700 80

19. 789
Standard form
Expanded form
_
700 80 9
+ + = 789

20. Example:
248
Standard form

21. 248
Standard form
___hundreds,
2 ___tens, ___ones
4 8
Expanded form 200 40 8
+ + = 248

22. Example:
485
Standard form

23. 485
Standard form
___hundreds,
4 ___tens, ___ones
8 5
Expanded form 400 80 5
+ + = 485

24. Practice
Exercises:
Please get your whiteboard
and marker!

25. Direction: Write the following numbers in
expanded form.
Standard Form Three-digit Expanded Form
432
867
579
831

26. Standard Form Three-digit Expanded Form
________ 700 + 10 + 8
________ 300 + 50 + 9
200 + 90 + 5
100 + 80 + 9
400 + 90 + 4
________
________
________
Direction: Fill in the blanks. Write the correct
STANDARD FORM.

27. Mathematics Activity:
Get Ready page: 29 (1-8)
Work Together page: 29 (9-16)
Work Alone page 30: (17-26)