j'ai besoins d'aide en math

Bonjour,

On a

364 = 2 * 182 = 2 * 2 * 91 = 2 * 2 * 7 * 13

455 = 5 * 91 = 5 * 7 * 13

Donc

17/364 + 19/455 = 17 / (4 * 91) + 19 / (5 * 91)

17/364 + 19/455 = (17 *5) / (4 * 5 * 91) + (19*4) / (4 * 5 * 91)

17/364 + 19/455 = (17 *5 + 19*4) / (4 * 5 * 91)

17/364 + 19/455 = (85 + 76) / (1820) = 161/1820 = (7 * 23) / (7 * 260)

17/364 + 19/455 = 23/260

Bonjour!!

17/ 364 + 19/455

= 17/364 * 455/455 + 19/455* 364/364

= 7 735/ 165 620 + 6 916/ 165 620

= 14 651/ 165 620

14/651 /7 = 2 093

 165620/7 = 23 660

2 093/23 660

2093/7 = 299

23 660/7 =3 380

299/3 380

13,23

299/13 =23

3 380/13 = 260

=> 23/260