Using the Subtraction Strip Board, the child practices the equations of the subtraction tables 1-18. Natural wooden strips corresponding in length to the squares 1-18 are used to indicate the number to subtract from (minuend) and one set of blue strips used to subtract with (subtrahend). A set of red strips is included for further explorations. The two sets of strips are stored in wooden boxes with lid.
Note: GAM Gonzagarredi Montessori materials are not an economy brand. The products are manufactured in such a way so they can endure daily use for many years in childcare, home-learning, and school environments.
These products are produced in company owned factories with the commitment of high-grade craftsmanship, sustainability, and environmental and social responsibility. The products are made of sustainable raw materials, such as wood from planted European forests and water-based inks and paints, and meet the demands of various rigorous safety regulations, including EN71 and ASTM.
Please note that Montessori materials are not toys, but educational, teaching materials. They are designed to be used under the supervision of professionally trained adults in a school environment. Please always use these products under supervision to ensure they are used correctly and safely. Some of the Montessori materials and tools may contain swallowable, small, rough, pointed, or other elements that can cause injury or damage if used improperly.
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