The file 'Fractions Panel (分数パネル) 3D Printer Model' is (stl) file type, size is 2.0MB.
Tiles for explaining common fractions. Easier than making them on paper, since you need to make two sets to explain temporary fractions.
よくある分数説明用のタイル。仮分数を説明するのに2セット作る必要があるので、紙で作るより楽。