More Addition Strategies
from Elementary and Middle School Mathematics by John
A. Van De Walle
Pearson Education, Boston, 2004
TenFrame Adding
and Subtracting
Numbers, Squares, Sticks, and Dots
50 and Some More
The Other Part of 100
Compatible Pairs
Calculator Challenge Counting
Little
TenFrame Addition and Subtraction
Activity 13.1 Review the
maketen idea (add on to get up to 10 and then add the

Activity 13.3 Say a number
between 50 and 100. 
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