| 摘要 |
PROBLEM TO BE SOLVED: To provide arithmetic card integrating multiplication (times table), addition, and subtraction in one card and enjoyed by one or two.SOLUTION: A card is created with the numerals of multiplication 5 (times table) set as a basis, and a calculating formula is displayed on one side by writing "+" in the upper part, "×" in the middle part, and "-" in the lower part to perform multiplication 5 (times table), addition 4, and subtraction 6 constituting a calculating formula. The answer of the calculating formula is disposed in a rear surface, the answer 10 of the addition is displayed in an upper left part, the answer 11 of the multiplication (times table) is displayed in the middle part, and the answer 12 of the subtraction is displayed in the right lower part. For the multiplication 5 (times table), furigana of the times table is displayed on the numeral to be easily remembered. To facilitate alignment of cards randomly arranged in the rear and front surfaces and the upper and lower parts, projections 13 and 14 are arrange on the opposing sides of the cards, and the directions of the cards are set in the same plane and the same direction by two operations. |
