do the math

do the math

1. Literally, to do a bit of arithmetic calculation. Primarily heard in US, South Africa. Well, let's just do the math to see if you have enough in your savings account to afford a new car.
2. To figure out or put together information for oneself. Primarily heard in US, South Africa. Do the math—can't you see that he's just using you to get ahead in the company?
References in periodicals archive ?
Our present leadership in Washington should get out their calculators (made in China), do the math and then stop the exodus.
So if you do the math, you will realize there are lots and lots of unused numbers.