Vertical flash card includes 1 box of addition and subtraction cards and is great for teaching the relationship of addition/subtraction and multiply/divide.Best Seller! Notched corners for quick organization. Large, easy to handle 6-1/4" x 3-1/4" cards. Bold, heavy type to use with large groups. Durable, thick card stock (14 pt.). Self-checking. Great for small groups, pairs, and whole class participation. Great for teaching the relationship between +/-, (e.g.: 3+1=4 on one side, 4-1=3 on the reverse).
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