Addition
Strategies
Traditional Algorithm
http://lisdelemmath.blogspot.co
m/2012/10/traditional-vsinvented-algorithms.html#.V
ftwft9VhBc
These are some of the strategies that 3rd grade
students might use depending on their math
understanding and ability to move from hands on to
more abstract math (as in the traditional method).
Act It Out
Use Base 10 Blocks to show your
addends. Combine them to find
the sum. http://www.eduplace.com
/math/mathsteps/2/c/
Compensation
www.det.nsw.edu.au
For example: 52 + 39
Think 52 + 40 = 92
BUT because I added 1 to 39 to
round up to 40 I need to subtract
1 from my answer.
So: 52 + (40 – 1) = 91
http://www.polk.k12.ga.us/olc/
page.aspx?id=47553&s=71
http://www.showme.com/s
h/?h=BhO20g4
Draw a Picture: Base 10
Draw/Use a Number Line
http://www.showme.com/s
h/?h=YE0nTAO
Break Apart/Partial Sums
Addition
Strategies
Traditional
Algorithm
Video Links: Click the strategy
name to link to an example.
Act It Out
Compensation
(With Base 10
Blocks and a Mat)
Draw a
Picture
Draw a
Picture
(Base 10 Model)
(Number Line)
Break Apart
(aka Partial Sums)