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Reinforce number families and addition skills with Three-Way Math Cards. Each card has three numbers, with two in blue and one in orange; the orange number is the sum of the other two. Students complete the number sentences as teacher's cover up one of the numbers on the card, or students may independently write the number family facts for the card. Card base 5'. Cards with a border are designed for grades 3 & up; cards without a border can be used for younger grades.
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