The doubles build on the addition doubles from grades 1 and 2.  In these earlier grades, they use a visual anchor as a scaffold for doubles.

For the multiplication doubles, we want to remind students of the visual anchors, and also of the addition fact.  If the addition doubles were learned earlier, the main task is to draw the connection between facts like 2 X 9 and 9 + 9.

Doubles Flash Cards
These cards show the the addition fact, as well as a visual anchor that should have been used for the earlier addition facts. For example, 2 X 4 shows a spider, which has 4 legs on a side and 8 in total. These doubles cards are set as two cards per page.

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