Noun
(US, education, historical) A dramatic and short-lived change in the teaching of mathematics in grade schools in the 1960s, focusing on abstract topics such as symbolic logic, to the detriment of simple arithmetic etc.
(derogatory, by extension) The methodology used to arrive at an unreasonably incorrect answer for a mathematical calculation.
She quickly calculated the tip to be $45.00 on the restaurant tab of $110.50, apparently using new math.
New Math (uncountable)
Alternative form of new math
By the end of an intense four years at UCLA, I had co-authored a new math proof, which the media, in fact, loved. As it turned out, math itself blazed my entry back into the spotlight and consequently into wonderful acting jobs like 'The West Wing' and others. You just never know, do you? Danica McKellar
Euler diagrams were incorporated as part of instruction in set theory as part of the new math movement in the 1960s. Source: Internet
The area under the auxiliary gym featured a new wrestling room, making room for three new math classrooms in the former location. Source: Internet