The real numbers form the first such number system. A sequence of numbers that can be ordered from least to greatest, the reals include all the familiar characters we learn in school, like –3.7, [Math ...

Weird Math David Darling and Agnijo Banerjee Basic Books, $27 Weird Math sets out to “reveal the strange connections between math and everyday life.” The book fulfills that laudable goal, in part.

Complex numbers are numbers that consist of two parts — a real number and an imaginary number. They are the building blocks of more intricate math, such as algebra.

Through hands-on service, Walters is helping students understand that math is more than numbers—it’s a language used to make sense of the world. “The name of this course is Math in Your World, so the ...