( 13\12 + 15\4) + х = 4, 1\2
(13\12 + 45\12) + х = 9\2
58\12 + х = 9/2
29\6 + х = 27\6
х = - 2\6
Задание: <span>Выполните действия
3+
= (3+8) +
= 11 </span><span>
или
3+8 </span><span>
= 3 + </span><span>
= </span><span>
+ </span><span>
= </span><span>
= 11 </span><span><span>
</span></span>