The purpose of this activity is for students to explain how a subtraction expression represents a story problem (MP2). Students connect the expression to the story problem and then solve the story problem. Students will be introduced to equations in a later unit.

• Write “ .”
• “¿Qué representa el 10 en el problema-historia? ¿Qué representa el 6?” // “What does the 10 represent in the story problem? What does the 6 represent?”
• “Tengo 10 y quito 6, quedan 4. Podemos escribir eso como  es 4” // “10 take away 6 is 4. We can write that as is 4.”

The purpose of this activity is for students to choose expressions that represent story problems (MP2).

• Display and . If needed, reread the second story problem.
• “¿Cuál expresión escogieron? ¿Cómo supieron cuál expresión escoger?” // “Which expression did you choose? How did you know which expression to choose?” ( . Some of the kids left, so I chose the one with the minus sign.)
• Display .
• “Usen esta expresión para contarle a su compañero lo que ocurrió en la historia” // “Use this expression to tell your partner what happened in the story.”

• Number Race
• Math Stories

• “De los problemas-historia que su compañero les contó, ¿cuál fue su favorito? ¿Por qué fue su favorito?” // “What was your favorite story problem that your partner told you? Why was it your favorite?”