| 摘要 |
PROBLEM TO BE SOLVED: To provide an arithmetic learning tool that enables infants and schoolchildren to acquire calculating ability of four operations, and suitable for ability development of other students or of adults, and for prevention of senile dementia. SOLUTION: The arithmetic learning tool comprises a display sheet 1, and a plurality of display pieces 3. On the display sheet 1, equation 2, 9, 11, 12 of any one of the four operations containing two or more blanks A, B and a plurality of solution displays (b) indicating the figure to fill one blank B are displayed. On the display piece 3, a question display (a), indicating a figure to be filled in the other blank A, corresponding to the solution display (b), is displayed on the surface side. On the solution display (b), the display piece 3, indicating the question display (a) corresponding to the solution display (b), is placed and, by removing the display piece 3, the solution display (b) is exposed. COPYRIGHT: (C)2008,JPO&INPIT
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