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Long Division

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by

Victoria Erdman

on 1 October 2013

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Transcript of Long Division

Long Division
For Fourth Graders
By Victoria Erdman

Some Definitions
Now We Know the Steps of Division!!! Here's a video to review what we've just learned:
So how is this different from the division we learned last week?
What we're used to: What we'll use now:

16÷4=4

16
4
4
17
5
3
-15
2
Quotient (our answer)
Dividend (number to be divided by another number)
Divisor
(the number
we divide by)
Remainder (what's left over)
Remember...
Step #1: Divide: Look at the First Number of the Dividend
How many times does 3 go into 7?
3 x 2 = 6 and 3 x 3 = 9. 9 is too big, so 3 goes into 7 two times.
78
3
2
Step #2: Multiplication
Multiply 2 x 3, and then put the answer underneath the 7.
78
3
2
6
Steps 3 & 4: Subtraction, Bring Down
Subtract the 6 from the 7 to get 1
Bring down the 8
78
3
2
-6
1
8
Step #5: Repeat "DMSB"!
Divide: 18÷3=6
Multiply: 6 x 3 = 18
Subtract: 18-18=0
Bring Down: There’s no other number after the 8 and there’s no remainder, so we’re done!

78
3
2
-6
18
6
-18
0
Review of Multiplication Facts
Division is the opposite of multiplication, so we need to know our multiplication facts really well!

http://www.multiplication.com/games/play/quick-flash-ii

Coolmath4kids.com (2013). How to do long division. Retrieved from
http://www.coolmath4kids.com/long-division/long-division-lesson-1.html.
Mathandreadinghelp.org (2013). How to teach long division to fourth grade students. Retrieved
from http://mathandreadinghelp.org/how_to_teach_division_to_fourth_grade.html.
The Animated Classroom (2011, Mar 1). The Steps to Long Division. Retrieved from

Walker, A. (2013). Quick Flash II: A fun way to practice the times tables. Retrieved from
http://www.multiplication.com/games/play/quick-flash-ii.
Practice Makes Perfect!
Doing Math Seems Brilliant!
References
17
3
5
Divide
Multiply
Subtract
Bring Down
Doing Math Seems Brilliant!
Divide, Multiply, Subtract, Bring down
-15
2
Quotient (our answer)
Divisor (number by which
the dividend is divided)
Dividend (number to be
divided by another number)
Remainder (what's left over)
Full transcript