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**Section b:**
* **Instruction:** Observa una de las mediciones realizadas:
* **Diagram Description:** A horizontal ruler is shown. It is marked from 90 to 280. Specific points are labeled:
* An arrow points to the mark '100' and is labeled '1 m'.
* An arrow points to the mark '200' and is labeled '2 m'.
* An arrow points to the mark '275'. This point is labeled 'Medida de la longitud entre los dos árboles'.
* **Dialogue/Explanation:**
* Image of a girl holding a measuring tape. Text bubble: Usando la huincha lograron medir la distancia entre los dos árboles: 275 centímetros.
* Text below girl: 275 centímetros = 2 metros 75 centímetros
* Text below girl: 275 cm = 2 m 75 cm
* Image of a boy. Text bubble: Eso quiere decir 2 metros y 75 centímetros.
* Text box on the right: El metro es la unidad básica para medir la longitud y tiene subunidades como el centímetro.
* Text box continues: 1 metro es igual a 100 centímetros.
* Text box continues: 1 m = 100 cm
**Section c:**
* **Instruction:** ¡Te toca a ti! Mide:
* **List of items to measure:**
* La altura de una mesa y de una puerta.
* El largo de tu pie y el contorno de tu cabeza.
* La altura de tu compañero de clases.
**Section d:**
* **Instruction:** Observa las mediciones que hicieron algunos estudiantes:
* **Diagram/Scene 1:** Two children standing side-by-side with a measuring tape held vertically between them.
* Girl's height is indicated by a dashed line at 130 cm, labeled "130 cm...".
* Boy is labeled "María mide 1 m 30 cm.". (Note: Label refers to the girl named María, not the boy).
* **Diagram/Scene 2:** Hand holding a pencil next to a ruler. The ruler is marked from 0 to 11. The pencil tip is aligned with 0, and the eraser end is aligned with 10.
* Text bubble: El lápiz mide 10 cm.
* **Text box on the right:** Para medir un objeto con la regla, se tiene que hacer coincidir uno de los extremos con el cero. Por ejemplo:
* **Diagram/Scene 3:** An eraser is shown next to a ruler marked from 0 to 8. The left end of the eraser is aligned with 0, and the right end is aligned with 6.
* **Text below Scene 3:** El borrador mide 6 cm.
* **Question:** ¿Con cuál de las afirmaciones estás de acuerdo? Explica tus razones. (Note: The affirmations themselves are missing from the image).
**Section e:**
* **Instruction:** Estima las longitudes.
* **Statement:** El gorila macho adulto puede llegar a tener una altura de 170 cm.
* **Instruction:** Estima las alturas de la vicuña, el oso gris y el elefante.
* **Diagram Description:** Four animals (gorilla, vicuña, grizzly bear, elephant) are shown standing next to each other. Dotted lines indicate their approximate heights from the ground.
* Gorilla: Height is indicated and labeled "170 cm".
* Vicuña: Shown as significantly shorter than the gorilla.
* Grizzly bear: Shown as taller than the vicuña but shorter than the gorilla.
* Elephant: Shown as significantly taller than all other animals.
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Today we will learn about measuring length using meters and centimeters. These are important units that help us measure distances and sizes of objects around us. We'll see how to use measuring tools and convert between different units.
Los estudiantes usaron una huincha para medir la distancia entre dos árboles. Su medición muestra 275 centímetros. Para entender esto mejor, podemos convertirlo a metros y centímetros. Como 1 metro equivale a 100 centímetros, 275 centímetros equivale a 2 metros y 75 centímetros.
When measuring with a ruler, it's essential to follow proper technique. Always align one end of the object with the zero mark on the ruler. Then read the measurement where the other end of the object aligns with the ruler. For example, this pencil measures exactly 10 centimeters, and this eraser measures 6 centimeters. We can also measure height, like María who is 130 centimeters tall, which equals 1 meter and 30 centimeters.
Now it's time for you to practice measuring! Pause this video and find a measuring tape or ruler. Try measuring the height of a table and a door, the length of your foot, the circumference of your head, and the height of a classmate. Remember to record your measurements in both centimeters and meters when appropriate. This hands-on practice will help you become more comfortable with these important measurement skills.
Now let's practice estimating lengths using comparison. We know that an adult male gorilla is 170 centimeters tall. Using the gorilla as our reference, try to estimate the heights of the other animals. The vicuña appears to be about half the height of the gorilla, so it might be around 85 centimeters. The grizzly bear looks slightly taller than the gorilla, perhaps around 200 centimeters. The elephant is much taller, possibly around 300 centimeters or 3 meters. Estimation skills help us make quick measurements when precise tools aren't available.