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Description Cotter Abacus is Made in the USA!* This 9-3/4" x 7-1/2" (24.75 cm x 19.25 cm) plastic abacus is grouped in 5s and 10s to encourage quantity recognition and visualization. On one side the child... For measuring and constructing angles from 0° to 180°. This replaces the common protractor for this curriculum.   WARNING: CHOKING HAZARD! Small parts. Not for children under 3 years...
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