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© 2017 NumberShapes
Ages: 6-12
Teaches: addition, subtraction, counting, base ten, math equations
CTR Review
This is a math practice and drill experience tool specifically designed to help children add three digit numbers using the “crossing ten” and “regrouping" method. 

After a confusing tutorial screen you are given the option to take a timed drill (1, 3 or 5 ...
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