455/40 + 280/90 = ? Плиз ПОМОГИТЕ

Question

455/40 + 280/90 = ? Плиз ПОМОГИТЕ

Answer 1

455/40+280/90=?; 45,5/4+28/9=?; 409,5/36+112/36=?×2; (819+224)/72; 1043/72=14 целых 35/72

Answer 2

455/40 = 91/8
280/90 = 28/9
91/8 + 28/9 = 819/72 + 224/72 = 1043/72 = 14 35/72
Ответ 10 35/72