1.   I did a quick calculation on a piece of paper.

2.   A quick calculation suggests there are over a hundred and sixty brown field sites of an industrial type and they amount to something like three hundred and sixty hectares.

3.   A few quick calculations suggested a par would enable him to survive and advance.

4.   A quick calculation shows that the fraction of economics laureates deemed worthy of winning a prize by themselves has dropped in the past decade.

5.   After a quick calculation, I discover, to my surprise, that I have been on trick-or-treat patrol for a decade now.

6.   But a quick calculation shows that the fraction of economics laureates deemed worthy by the judges of an entire prize by themselves has fallen sharply in the past decade.

7.   Gillett made a quick mental calculation that capitulation would be fatal.

8.   He was a Jimmy protege, so he learned the art of quick calculation.

9.   I did a quick calculation.

10.   Ms. Myers, the customer service representative, calls his name up on the computer screen and makes a quick calculation.