Math Resources & Documents

Number Bond Flash Cards
A number bond shows the relationship in a simple addition or subtraction probelm. The number bond is based on the concept "part-part-whole." To find the whole, students must add the two parts. To find a part, students must subtract the other part of the whole.
There are number bonds where students learn to make a ten and there are also number bonds that students can make doubles + 1 or doubles + 2.

The first 11 PDF files are ALL triangular flashcards:

Triangle Flash Cards share the same concept.

http://www.donnayoung.org/math/tricards.htm

(go here for multiplication & division triangle cards too!)

We will be practicing with these in class as well. Thanks!
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See Bar Modeling PDF for a breakdown from Kindergarten - 3rd