The purpose of this activity is for students to practice adding decimals. There are two versions of the game, Race to One and Race to One-Tenth. Students can choose which version to play, or, if there is time, play both versions of the game. Consider playing a round of the game with students during the Launch to demonstrate how it is played.

• “¿En qué se parecen los juegos ‘Carrera hasta uno’ y ‘Carrera hasta una décima’?” // “How are the two games, Race to One and Race to One-Tenth the same?” (In both cases, I ended up close to the goal value and then had to keep rolling, hoping to get the right number.)
• “¿En qué son diferentes los juegos?” // “How are the games different?” (In Race to One, I am aiming for 1 and in Race to One-Tenth I am trying to get 0.1. When I get close to 1 in Race to One, I have to choose hundredths, and when I get close to 0.1 in Race to One-Tenth, I have to choose thousandths.)
• “En el juego ‘Carrera hasta uno’, ¿cómo decidían si querían que el número que sacaban representara décimas o centésimas?” // “How did you decide whether to have a number represent tenths or hundredths in Race to One?” (If I wasn’t close to one, I made it represent the greater value, tenths.)

• “¿Qué número escogerían formar si al girar la ruleta les salieran 1, 8 y 4? ¿Por qué?” // “What number would you choose to make if you spun 1, 8, and 4? Why?” (84.1, because that’s the greatest number I can make with those digits with the game.)
• “¿Se puede ganar el juego en una ronda? ¿Cómo?” // “Is it possible to win the game in one turn? How?” (Yes, I can spin 6, 2, and 8 and then can make 862 and that’s the end of the game.)
• “Si quisieran ganar el juego rápidamente, ¿cuáles serían los peores números que les podrían salir?” // “What numbers are the worst numbers to spin if you want to win the game quickly?” (Odd numbers, because they only count for tenths, hundredths, or thousandths. Also 0 is no good unless there are some other even numbers.)
• “¿Pueden pensar en una forma de cambiar este juego para volverlo más retador?” // “Can you think of a way to change this game to make it more challenging?” (Make it so you have to reach exactly 500.)