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Montessori materials are NOT toys, but educational materials. Proper use requires appropriate training.
Montessori materials may contain small, rough, sharp, or other elements that could cause injury or damage if used improperly.
It may therefore only be used by children under the supervision of appropriately trained persons and in an appropriate environment.
With the help of the addition tables, children can practice and memorize all basic addition tasks in the number range from one to nine. The material consists of six tables and a box with results. Table 1 is a control table on which all tasks and results are printed. Table 2 is a control table with all inversions omitted. Tables 3 to 6 are work tables. Table 6 also includes a wooden box with result tiles.