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Cross-Curricular Math

AMath Trick!

Predictions without a basis in math are little more than guesses. People who predict the weather, the economy. or results of elections rely on statistical data. That is why they are usually fairly accurate.

However, you too can amaze your friends and family by predicting the answer to a mathematical puzzle. Just follow these simple steps.

Tell your friend to reverse the number...801Then subtract the first number from the original number (your friend can use a calculator if he or she wants):801-108=693

Choose your victim (OK, friendl). Tell them to think of a three-digit number, where the first and last numbers differ by at least two.

108(There are more than two numbers between 1and 8).

For example:

Now, have them reverse this number: 396

Write the number 1089 on a piece of paper and fold it up. This is the answer to the math problem!

Finally, tell them to add the two last three-digit numbers together 693+396=1089

Before they give you the answer. present the folded piece of paper. (Do it like a magician, with a flounish!) Watch your friend's face as he or she realizes that you already have the correct answer!

This will work with any three-digit number-as long as the first and last digits differ by at least two.Try it and see!

Source:Archivo editorlal

In pairs, discuss how math is useful when making predictions in everyday life.

Read the opening paragraph and check your answers.

3Read the rest of the article and follow the instructions.

A In pairs, practice with different numbers.

In groups, discuss any other math tricks you know. Create a math trick for the other groups to solve.

Lesson 7.Teens and Technology105

Siguen la estructura propuesta por el ejemplo: The text follows the structure given by the example.

La idea principal está desarrollada de manera clara: The main idea is clear.

Da opiniones a favor y en contra del tema: It gives opinions for and against the proposed question.

La conclusión tiene predicciones sobre el futuro: The conclusion has predictions about the future.

Preguntas de profundización

Con respecto al uso de estadísticas para hacer predicciones, se puede pedir a los estudiantes que reflexionen sobre lo siguiente: Why do you think basing predictions on statistics works? Does it always work? Why/why not?

Propósito y recomendaciones

El propósito de esta sección consiste en permitir a los alumnos aplicar el uso del idioma a través de una discusión y actividades de otra disciplina, en este caso matemáticas. Esto les permitirá a los estudiantes practicar el idioma de manera más natural, enfocándose en la actividad matemática y no en el inglés en sí, pero a la vez poniendo en práctica de manera contextualizada el vocabulario y estructuras aprendidas a lo largo de la lección.

Al final de la actividad, puede motivar a los estudiantes a reflexionar sobre el trabajo que realizaron, a través de preguntas como:

• What was the most difficult part of the activity?

• How would you improve your performance in the activity?

Solucionario

Cross Curricular Math

1. Math is useful for predictions because it allows us to make more accurate predictions.

2. Respuesta variable.

3. Respuesta variable.

4. Respuesta variable.

5. Respuesta variable.

UNIT 4

Texto del estudiante





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