| 摘要 |
PROBLEM TO BE SOLVED: To provide an arithmetic learning tube that enables a small child to understand basis of numbers extremely important in childhood and enables improvement of learning effect in learning arithmetic, while enhancing sense of beauty, as far as primary four arithmetic operations with pleasure, interest, and body feeling. SOLUTION: By rotationally moving 19 colored spherical bodies (such as glass beads) in a sealed soft transparent tube, the sense of beauty is developed, and by holding the tube with both hands, a child can understand numbers with pleasure and interest and the development of intelligence is encouraged learning four arithmetic operations. A pinch for pressing the four operations spherical body is used as an auxiliary implement.
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