What is p+q? Please give step by step method. In this question $p = a\times10^m$ and $q=b\times 10^m$, where $a+b > 10$,
what is $p+q$?
I may be right or wrong, I do not know, but this is what I have so far:
$$p+q > (a+b) \times 10^m$$
Give a step by step method please.

It is perfectly correct to say $p+q=(a+b)\times10^m$, but it will be marked wrong because the unstated assumption is that the thing that isn't a power of $10$ should be between $1$ and $10$.  The expected answer is $p+q=\frac {a+b}{10} \times 10^{m+1}$.  Assuming $1 \le a,b \lt 10$ and as you are given $a+b \gt 10$ you know the thing multiplying the power of $10$ is between $1$ and $10$.
