1, 2,5 How many different ways to get 2 yuan?
2 yuan =20 angle = 20×1=10× 2 = 5× 4 ① 201angle; ② 10 2 angle; ③ Four 5 angles; ④ 65438+2 angles and 9 angles; ⑤ Four corners 1, Octagonal 2, Hexagonal 2, Octagonal 2, Hexagonal 2, 1, 10 Angle 2, Pentagonal 2. ...