Addition Car Racing Home Addition Car Racing 0.0 / 5 ( 0 votes ) Your Rating? Discover Addition Car Racing – Play Free Now on GameHard! This is a racing game. The racing cars run on the power of your correct answers. The speed of your car increases when you answer correctly. The faster you answer, the faster your car goes! In case you answer incorrectly, your speed will decrease. The player who answers correctly with speed will win the race. Categories in which Addition Car Racing is included: Puzzle Love 1 Player Thinking