the study on the design of teaching aids, in particular, to accept the pain and in addition and subtraction can effectively teaching study on mathematical education.;this research, according to the mathematics learning tool and / or in the numbers shown on the cover plate and the cover plate of the lower part is fixed on the support plate to the support panel composed of a number of revision; the digital version of put on the side it is not the case, and an opening is formed in the box, the box is in the positive direction, and the both sides of the wall is formed to supply the body; the body on both sides of the wall of the opening of the uc0acuc774uc758. for the account. the house is on the side of the drawer and the drawer is the digital version of the above means is placed is placed, is processing the data; etc.. therefore, this design according to the received and the addition and subtraction in learning to play through an operation. in the forest, and to learn to learn, children's interest in mathematics to be able to feel the learning effect, the maximum will be able to.
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