Nathan went to the arcade. He played the air hockey game 2 times and the basketball game 4 times. If each game cost 3 tokens, how many tokens did he use?
Nathan played a total of 2 air hockey + 4 basketball = <T>add(2, 4)=6 games.
This cost him 6 games x 3 tokens each = <T>multiply(6, 3)=18 tokens.
