Code where the addition is:
for(int idx = 0; idx < len; idx++)
{
int length = 2;
normalOperaterQuAns.Add(new float[length+1]);
for(int i = 0; i < length; i++)
{
normalOperaterQuAns[idx][i] = Random.Range(100.0f, 999.9f);
}
normalOperaterQuAns[idx][2] = normalOperaterQuAns[idx][0] + normalOperaterQuAns[idx][1];
print(normalOperaterQuAns[idx][0]+" + "+normalOperaterQuAns[idx][1]+" = "+normalOperaterQuAns[idx][2]);
}
(len = 2)