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Use these math-fact triangles again and again! Familiar triangle format offers a powerful method for building number fact fluency and teaching fact families. Focuses on both addition/subtraction (on the front side) and multiplication/division (on reverse). Supports the development of higher-level algebraic skills such as equation building, the commutative property, and problem-solving. Set of 5. Write & wipe surface on both sides of the board. Triangle boards measure 10" H. Triangle format helps students explore the relationship between numbers Supports development of higher–level algebraic skills such as equation building, the commutative property, and problem solving Double-sided board focuses on addition/subtraction on one side and multiplication/division on reverse Set of 5 boards Ideal for ages 6+