Basic learning of addition subtraction by the building block of the sliding operation Aids

摘要

The present invention relates to children with weak consciousness in addition and basic learning of subtraction, including to a carry borrow up to 20 in the lower grades of elementary schools induction phase, and sustained effectively through the manipulation of concrete objects to draw more interest Efforts to learning, it is an object of the present invention to achieve the understanding and learning. A normal 2 to 3 times the length of the calculation building blocks dish of calculation block of plastic to use in elementary school, three times the rail and 20 use on up to 10 can be calculated operation while quickly gliding move the calculation building blocks 2 that to form an iodine twice double track rail 10 until, calculated at the time to be provided quickly hid put tunnel computational building blocks 2 can concentrate better which is not visible to children, compact storage box quickly confine form the calculation building blocks with a combination of its rail and tunnel It was formed. In addition, because of the transition to the formal calculation operation by the numbers and formulas, it was equipped with a back-calculated type card stand 20 which can be seen back-calculated relationship of addition subtraction. .BACKGROUND 7