Primary Montessori Math Boards Bundle - These math boards for all four operations (addition, subtraction, multiplication, and division), operation slips, and booklets will assist children with learning their math facts in a concrete and visual way.Includes:addition strip board, charts & instructionsaddition equation slips (color-coded)addition equation slipsdivision charts & instructionsunit division board & instructionsdivision equation slips (color-coded)division equation slipsmult