REA para la UD PROPORCIONALITY
Comenzaremos la actividad con un VIDEO introductorio muy entretenido e interesante para el nivel de 1º ESO:
Para la adecuada comprensión del tema, trabajaremos con un glosario de las palabras en inglés más útiles. Éste se irá completando a lo largo de la unidad.
Usa el enlace anterior para ir elaborando nuestro glosario en tu cuaderno.
Por ejemplo:
Proportion, percentage, magnitude, constant of variation, constant ratio,
accurate, compatible number, submit
Para comenzar las explicaciones nos ayudaremos de la siguiente presentación PREZI que he elaborado a tal efecto.
Proponemos a continuación una serie de ejercicios para asimilar los contenidos:
1. This table shows how the length of Keenan's essay depends on the number of hours he spends writing this week.
| Total pages Keenan has written | ||
Hours spent writing, x
| 3 | 4 |
Total pages written, y
| 3 | 4 |
How many pages does Keenan write per hour?
2. This graph shows how the amount of time that a receptionist named Tony spends on the phone is related to the number of phone calls he routes to employees.
What is the constant of variation?
Write your answer as a decimal or integer.
minutes per phone call
3. Shontal bought 2 postcards during 2 days of holiday. Then, on another
trip, she bought 10 postcards during 10 days of holiday. How many
postcards does Shontal buy during one day of holiday?
postcards
4. This equation shows how the total number of quizzes Mia has ever taken
in college depends on the number of weeks she has attended school this
quarter.
q = 6w
The variable w represents the number of weeks she has attended school this quarter, and the variable q represents the total number of quizzes she has ever taken in college. After attending 2 weeks of school this quarter, how many quizzes will Mia have taken in total?
quizze
5. What is 60% of 45?
6. Megan's Tea Shop has caffeinated tea and decaffeinated tea. During the
lunchtime rush, the tea shop served 84 teas in all, 25% of which were
caffeinated. How many caffeinated teas did the tea shop serve
caffeinated tea
7. €3 is what percent of €10?
Write your answer using a percent sign (%). For example, 0.5%, 12.7%, or 56%.
Write your answer using a percent sign (%). For example, 0.5%, 12.7%, or 56%.
8. The sports shop has 22 part-time employees and 66 full-time employees.
What percentage of the employees at the sports shop work part-time?
Write your answer using a percent sign (%).
Actividades como estas encontraremos en la siguiente página:
Como refuerzo y para que ningún contenido quede sin entender muchos más ejercicios interactivos:
Y una muy interesante de porcentajes
Hay mucho más en la siguiente página:
libros vivos
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