Standard form and
Expanded form
3rd grade Mathematics
Sarah Cooper
OBJECTIVES



Students will learn the difference between
Standard form and Expanded form.
Students will learn how to properly write a
number from standard form into expanded form.
Students will learn the hundreds, tens, and ones
place value.
PRE-ASSESSMENT ACTIVITY

Write the following number in expanded form
using the pen tool.
246
_______+_______+_______=246
Which answer has 369 correctly written in
expanded form? Answer using the polling
response menu.
A. 30+600+9
B. 3,000+60+9

C. 300+60+9
D. 300+600+90
LETS CHECK YOUR ANSWER

Write 246 in expanded form.
200+40+6

Click the green check mark if you got that right
and the red “X” if you didn’t.
LETS CHECK YOUR ANSWER
Which answer has 369 correctly written in
expanded form?
A. 30+600+9
B. 3,000+60+9

C. 300+60+9

D. 300+600+90
If you picked “C” please send a smiley emoticon
in the chat box. If you did not, please send a sad
face in the chat box.
INTRODUCTION
Definitions
 Standard form: a way to write a number using
the numbers 0-9


Expanded form: a way to write a number
showing the value of each number
INTRODUCTION CONTINUED
Please watch the following video to help
understand standard form and expanded form.
https://www.youtube.com/watch?v=4AF7xj7pmWc

Please watch the following video to help
understand place value.
https://www.youtube.com/watch?v=omkDLmfvetk

WRITING NUMBERS IN EXPANDED FORM


Remember when writing numbers in expanded
form you have a hundreds, tens, and ones spot.
So 486 is the same as
400+80+6=486
OR
400
80
+ 6
486
WRITING NUMBERS IN EXPANDED FORM
Write the following numbers in expanded form:
 A. 511
_____+_____+_____= 511


B. 924
_____+_____+_____= 924

C. 751
_____+_____+_____= 751
D. 13
_____+_____=13
 Once you have finished please click the raise
hand button.

ANSWER CHECK
Lets check to see how many we got right!!
 A. 500+10+1

B. 900+20+4

C. 700+50+1

D. 10+3
WRITING NUMBERS IN STANDARD FORM
Now lets take numbers in expanded form and put
them in standard form. Good Luck!
 A. 400+30+8=______


B. 900+20+1=______

C. 600+50+7=______
D. 100+90+3=______
 When you’re finished please say “done” through
the microphone.

ANSWER CHECK
Let’s see how many we got right!
 A. 438


B. 921

C. 657
D. 193
 If you got them all right click the green check
mark, if you didn’t click the red “X”.

MORE PRACTICE
By using the line tool connect the numbers on the
left with its correct match on the right.
 539
900+10+8


766
500+30+9

918
700+60+6
POST-ASSESSMENT
Use the highlighter tool to highlight the correct
answer. Which answer is correct for writing 592
in expanded form?
A. 50+90+20
B. 500+9+2
C. 500+90+2
D.500+900+20
 Use the pointer tool to point to the correct
answer. What does 400+30+1 look like in
standard form?
A. 4,301
C. 413
B. 431
D. 4,031

ANSWER CHECK
Write 592 in expanded form.
Did you pick C. 500+90+2? If so you’re RIGHT!!!


Write 400+30+1 in standard form. Did you pick
B.431? If so you’re RIGHT!!!
EXTENSION ACTIVITY
Please answer the following questions for homework.
 Write the following numbers in expanded form and
standard form:
A. 548
F. 50+5
B. 3,291
G. 900+10+7
C. 499
H.4,000+200+80+2
D. 1,876
I. 800+30+4
E. 30
J. 90+9

**Tip** re-watch the place value video for more help on
place value. These may be a little tricky just try your
best! Good Luck!!