To provide a board and a teaching tool for calculation practice that are in simple structure, not bulky, and easy to use, enable a user to easily understand the concept of carry and borrow, and let the user repeatedly practice in calculation accompanied with carry and borrow without getting tired soon.
The teaching tool is equipped with a counting piece 11, the board 10 for calculation practice having rectangular base paper 13 where two groove parts 12 as storage parts slidably storing the counting piece 11 are formed at the left part and the right part respectively, a number extractor 20 for extracting at random numbers to be added with carry and subtracted with borrow by using the board 10 for calculation practice, and a practice problem book 30 having a plurality of practice problems etc. for repetitive practice in addition and subtraction accompanied with carry and borrow by using the board 10 for calculation practice based upon the numbers extracted by the number extractor 20.
ABE IZUMI
KUKI YUKIE
SAKUTA YASUSHI
ISHIGAKI REI
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