to do the math
(idiomatic, US) To do the calculation for oneself.
Usage notes
Although US in origin, the phrase is becoming increasingly common in the UK, despite that the fact that the UK abbreviation for mathematics is maths.
http://en.wiktionary.org/wiki/do_the_math
do the math
To figure something out. To come to a solution or conclusion based on other facts.
Man, I saw your girl out with two other guys on two separate occasions. You do the math.
http://www.urbandictionary.com/define.php?term=do the math
(idiomatic, US) To do the calculation for oneself.
Usage notes
Although US in origin, the phrase is becoming increasingly common in the UK, despite that the fact that the UK abbreviation for mathematics is maths.
http://en.wiktionary.org/wiki/do_the_math
do the math
To figure something out. To come to a solution or conclusion based on other facts.
Man, I saw your girl out with two other guys on two separate occasions. You do the math.
http://www.urbandictionary.com/define.php?term=do the math
κάνω τις πράξεις (ή είναι πολύ αγγλισμός;)
κάθομαι και τα υπολογίζω
τα βάζω κάτω (και τα υπολογίζω / και βγάζω συμπέρασμα)
Γιά πείτε, γιά πείτε...