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One effort to improve elementary school students' arithmetic (numeracy) skills is to use learning media in the form of an abacus. The abacus, also known as mental arithmetic, is a medium for developing thinking and calculating abilities in mathematics and is able to balance the abilities of the right and left brain. Therefore, SD 01 Ulak Karang teachers need to improve their skills in using the abacus, so that these skills can be mastered and provided to students well. The method of this activity includes basic level abacus training, namely (1) introducing body posture when using an abacus, (2) introducing the rules and how to operate/move the abacus beads, (3) introducing number notations represented by one or a group of abacus beads.  (4) introduce the technique of calculating addition and subtraction using an abacus and practice questions. Based on the results of this activity, the teachers at SDN 01 Ulak Karang Selatan are familiar with the technique of calculating with an abacus and can use the abacus to carry out addition and subtraction operations correctly and quickly. The teachers were very enthusiastic about being able to master all the techniques and calculation operations with the abacus.

This research aims to improve the calculation skills for the operation of adding natural numbers using beads as a medium for class I students at SDN No. 14 Cikowang Presidential Instruction, Takalar Regency. The type of research used is Class Action Research which consists of two cycles where each cycle is carried out in three meetings. Research procedures include planning, action, observation and reflection. The subjects in this research were class I students at SDN No. 14 Cikowang Presidential Instruction, Takalar Regency as many as 23 people. The research instruments used in this research were observation sheets and giving learning outcomes tests. The data collection techniques used are observation and tests. The results of the research showed that in cycle I, of the 23 students who completed individually, only 13 students or 57% met the minimum completion criteria (KKM) or were in the very low category. Classically it has not been fulfilled because the average value obtained was 63.1%. Meanwhile, in cycle II, of the 23 students, 23 had fulfilled the KKM and the average score obtained by students was 93.2%, which was in the very good category. Based on the results of the research above, it can be concluded that the use of bead media can improve the numeracy skills of adding natural numbers in class I students at SDN No. 14 Cikowang Presidential Instruction, Takalar Regency.