The article I picked was from the Star Tribune about Boehner and a budget compromise. Since the story is about a budget they use numbers to talk mostly about money in this article. The reporter used number mostly in dollar amounts and by rounding like saying "around $33 billion," and "more than $60 billion." The reporter also used number in quotes like "We control one half of one third of the government here in Washington," and in an exact number count like "the 87 freshmen Republicans."
I do not think that the numbers in this story are overwhelming because for the most part the reporter rounded to make it easier to look at, and wrote comparison phrases. I do not think that the reporter had to use much math to find these numbers, mostly just rounding up or down and searching for the right amounts. The only source that I found to the numbers listed was Biden, like when he said "confirmed by Biden." The rest of the numbers I suppose could be found by anyone because it's public information.