Este documento proporciona instrucciones sobre cómo comparar, sumar, restar, multiplicar y dividir fracciones. Explica cómo calcular una fracción de una cantidad, trabajar con números mixtos, y realizar cálculos con porcentajes. También incluye enlaces a recursos adicionales sobre fracciones.
The document discusses the results of a study on the effects of exercise on memory and thinking abilities in older adults. The study found that regular exercise can help reduce the decline in thinking abilities that often occurs with age. Older adults who exercised regularly performed better on cognitive tests and brain scans showed they had greater activity in important areas for memory and learning compared to less active peers.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against developing mental illness and improve symptoms for those who already suffer from conditions like anxiety and depression.
The document defines multiples of a natural number as the natural numbers resulting from multiplying that number by other natural numbers. It gives examples of multiples of 2 (2, 4, 6, 8, etc.) and multiples of 8 (8, 16, 24, 32, etc.). It states that a natural number has an infinite number of multiples and that all natural numbers are multiples of 1.
Este documento proporciona instrucciones sobre cómo comparar, sumar, restar, multiplicar y dividir fracciones. Explica cómo calcular una fracción de una cantidad, trabajar con números mixtos, y realizar cálculos con porcentajes. También incluye enlaces a recursos adicionales sobre fracciones.
The document discusses the results of a study on the effects of exercise on memory and thinking abilities in older adults. The study found that regular exercise can help reduce the decline in thinking abilities that often occurs with age. Older adults who exercised regularly performed better on cognitive tests and brain scans showed they had greater activity in important areas for memory and learning compared to less active peers.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against developing mental illness and improve symptoms for those who already suffer from conditions like anxiety and depression.
The document defines multiples of a natural number as the natural numbers resulting from multiplying that number by other natural numbers. It gives examples of multiples of 2 (2, 4, 6, 8, etc.) and multiples of 8 (8, 16, 24, 32, etc.). It states that a natural number has an infinite number of multiples and that all natural numbers are multiples of 1.
2. LA PROTECCIÓ DE L’ULL
Les CELLES i les PESTANYES, que eviten que
entri suor i pols als ulls.
Les PARPELLES, que es tanquen davant de
qualsevol perill.
Les GLÀNDULES LACRIMALS, que mantenen els
ulls humits i els renten amb les LLÀGRIMES.
4. COM HIVEIEM?
La llum entra travessant la còrnia que és transparent
Passa aquesta llum per la pupil·la (cercle negre) que es
troba al mig de l'iris (cercle de color).
Travessant el cristalí, l'imatge observada s'enfoca
correctament.
Com si es tractés d'una pantalla les imatges es projecten a
la retina. Mitjançant el nervi òptic aquesta informació es
porta al cervell.
