https://mathweb.ru/allsystem.html?id=308772

Сложить 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011100111000.101(2) и 1101100011.101(2) = 101010011100.01 Столбиком

Введите два числа и укажите их основание системы счиления:
.........
+0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011100111000.101
1101100011.101
0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000101010011100.010
Ответ: 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011100111000.1012 + 1101100011.1012 = 101010011100.012