Mathematics Teaching aids include two sets of wooden counting boards and digital magnets. There are 10 grooves on each counting board, corresponding to the number "10". Different colored cylindrical blocks are placed in the left groove, representing addends respectively. The number magnets below further enhance the expression of the formula. In teaching, students intuitively perceive that "10 can be decomposed into 6 and 4" and "10 can be decomposed into 8 and 2" by placing cylindrical blocks, understand the commutative law of addition and the relationship between numbers, and are suitable for early elementary school mathematics enlightenment, effectively cultivating numerical sense and operational logic.