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The set consists of two control charts, four working charts and one box of wooden answer chips. The Addition Working Charts aid the child in practice and memorization of the unit addition combinations. The charts measure 42 cm x 27 cm and 27 cm x 27 cm. The tiles measure 2 cm square and are used to fill in the addition tables on the charts. The charts feature a durable hardwood frame to protect their edges from wear.
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