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Addition & Subtraction Triangle Flash Cards
[WCA4551]		 $5.95

Addition & Subtraction Triangle Flash Cards
Eliminate memory overload and learn four math facts on each side of a card! Triangle Flash Cards teach families of facts, showing the relationship between addition and subtraction. How is 4 in one corner related to 7 and 3 in the other corners? Cover the sum, in red, and practice addition: 4 + 3 = 7 or 3 + 4 = 7. Cover one of the addends, in black, and practice subtraction: 7 - 4 = 3 or 7 - 3 = 4. A total of 20 cards aid mastery of 160 math facts up to 9 + 9 and 18 - 9. For 2 or more players.
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$171.60


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