Math Rush is a timed cooperative card game for 1-5 players who will race to complete sets of matching cards in the right order. In Math Rush: Addition and Subtraction, the cards show sums and differences that must be played in ascending or descending order, meeting the requirements of the goal cards (odds only, subtraction only).

description from the designer

Think fast in Math Rush, a totally thrilling cooperative math game that will make your heart race and your head rev. For three rounds, up to five players must balance strategy and speed, properly sequencing sums and differences before the timer runs out. Crunch the numbers in a hurry and rack up more points; make an error and miss your goal. Whether you beat your high score or not, it’s more fun than you calculated.

description from the publisher