do the math 

An activity typically undertaken by single women between the ages of 27 and 33. The objective of "doing the math" is for the woman to determine the youngest age at which she could earliest enter into a marriage and, later, have a child. The end result being that the woman determines the extent to which she will lower her standards.

Krystal: "Chrystal, I'm almost 30. Do the math. If I met a guy today, it would be at least two years before we get engaged, then another year to get married and then another year to live together before we might start trying to have a baby. That means I would be at least 33 when I have my first kid. I don't want to be 33 when I start having kids! Do you know any single guys?"
Chrystal: "No."

Pete: "I'm 30 and single."
Steve: "So?"
Pete: "....."

do the math by jtweez2004 September 4, 2010

Organic Math 

A problem-solving heuristic or strategy that is not a product of imported approaches or procedures—for example, a deductive proof in geometry is unmistakably Greek in origin.

The bar model method, which is a mix of strategies from China, Russia, and the US, can’t be labeled “organic math”—ironically, this commonly known “Singapore model method” is anything but native math from Singapore.

Organic Math by MathPlus December 3, 2018

Babylon Math 

When math editors in Singapore would prostitute themselves for financial gain, by condoning practices like changing authors’ names to foreign ones when their titles are sold overseas (earning them zero royalties), or reusing their contents for similar titles without their permission.

Hoping to receive a fat bonus or secure a fast promotion, some editors of Singapore math textbooks have no qualms about condoning the dirty tricks of Babylon math to get ahead of their peers, or to join the management team in the shortest time.

Babylon Math by MathPlus September 26, 2018

Magic Math

Calc III, where nothing makes sense and everything is fake. 'Nuff said.

This magic math bullshit is whipping my ass.

Magic Math by Billy The Impaler December 13, 2004

Girl Math 

It is when you put an expense in terms that a girl can understand. If it costs $300.00 to get your brakes fixed, that is 4 pairs of shoes and three tubes of lipstick in girl math.

Kenzie: A: OMG! That speeding ticket is going to cost me $200.00!
Amber: That is like 2 pairs of shoes, 1 bottle of nail polish and 2 packages of skittles and a diet coke in girl math.

Girl Math by ICT-TARA April 1, 2010

Irish math

leprechaun-like ability to calculate to a number which best suits your needs.

Seamus relied on Irish math to:

a.)provide the correct number of drinks he had to the officer.

b.)advise his mother his first born did indeed arrive 9 months after the wedding

Irish math by sheila in the car May 10, 2009

Native Math 

A math theorem, formula, or method that originates from a particular country—for example, a deductive proof in plane geometry is unmistakably Greek, while a visual proof has a Chinese or Indian flavor.

In this age of regional or international collaboration among members of the mathematics community, when co-authoring a journal article often involves contributors of different nationalities, we can only expect native math to be the odd one in a sea of even hybrids.

Native Math by MathPlus December 2, 2018