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TIP: Use white to remove color from individual squares.
Swipe across horizontally or vertically to color an entire row or column.
Select a number from the top and left rows to see the sum (dark gray).
Select the + sign to see all the doubles sums.
View INTERACTIVE ADDITION CHART in Fullscreen Mode
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Interactive Addition Chart - Learning Connections
Essential Skills
Mental Math - visualize addition patterns

Common Core Connections - Grades K to 2
Add and subtract with 20.
Commutative property of addition.
Look for and make use of structure.
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