If it happens, that's usually just bad accounting (a math error), or else a case of fraud.

Hundreds of 1040EZ returns in the survey contained simple math errors.

I mean, we showed him a chart, and he caught a math error we made.

Players who consistently have high scores are permitted to make innocent math errors to avoid always winning.

It is considered unsportsmanlike for those who consistently have low scores to make innocent math errors that give them a higher total.

Accountants, for example, make math errors, and we've all heard about the glitches in computer tax programs.

I suppose this is necessary, in his mind, since he makes a math error or two himself.

One expert pointed to a math error in the report as evidence of that bias.

All of the calculations are done automatically, so the taxpayer doesn't have to worry about making a math error.

A manufacturer building the chip into a computer noticed that the processor sometimes made a subtle math error.