Familiar triangle format reinforces fact families and number fact fluency. Double-sided, write and wipe boards focus on addition/subtraction on one side, multiplication/division on reverse. Support algebraic skills such as equations, the commutative property, and problem solving. The Learning Resources Write and Wipe Fact Family Boards - Set of 5 Features: 5 Double-sided Triangle Boards Write and Wipe Surfaces Size of 10 inch H each
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