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The MENTAL addition and subtraction strip game
The set consists of two boards-tables, divided into cells, and a set of strips: red, blue and wooden.
1. A game with strips for assembly:
The table is divided into intervals from 1 to 10 in red and from 11 to 18 in blue. A vertical red strip divides the table into two parts, which helps the child perceive the composition of numbers and introduces him to the commutative law. Exercises with this set help the child to develop addition skills within 20.
2. Game with strips for subtraction:
The subtraction table is divided into two intervals from 1 to 9 in blue and from 11 to 18 in red. This game allows the child to solve subtraction examples from 18 to 1 with simplification and visual material. It facilitates the easy assimilation of the school curriculum from large numerical ranges.