12,A.) 368 + 188=556
12,A.) 188+368=556
12,B.) Part A is using addition (maybe, I don't really know what the question is asking)
13.) 5+6+1= 5+6+1
14.) first solve in parentheses, 18+35= 53. 53 x 4=212. 212 + 35= 247. 247 x 4= 988. The answer is false.
15.) I can not see it
I don't know if these answers are correct or not, but I hope it helps.