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Cálculo mental 3
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Para multiplicar un número por 3, se le suma su doble. Por ejemplo: 14 · 3 = 14 + 28 = 42 Aplica esta estrategia para calcular: 118 · 3 = 134 · 3 = 2015 · 3 = 10105 · 3 =
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Expresiones de números 4
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Escribe la expresión del número que se obtiene cuando a un número cualquiera se le restan 2 unidades. La expresión será:
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Problemas 4
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En una granja hay 640 cerdos que tienen alimento para 72 días. ¿Cuántos cerdos tienen que vender si quieren que el alimento dure 80 días, manteniendo la misma ración por animal? Deben vender cerdos.
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Magnitudes directamente proporcionales 9
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Doscientos cincuenta gramos de chorizo valen 4,8 €. ¿Cuánto costarán 2 kilogramos? 2 kilogramos costarán €.
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Check. Our planet Earth
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Answer the questions based on what you have read in the introduction: What is the Milky Way? How many stars are in the Milky Way? What makes up the Solar System? Why do we have day and night on Earth?…
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Calculate. Leap years
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Leap years are years in which there are 29 days in February instead of 28. They happen every four years. Juan’s granny is very old but she says that she is only 23 because she was born on the 29th of…
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Self-evaluation 3 - Weather and climate
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Which subject do you associate with the following statements?: Water vapour, when it condenses, forms clouds. There are three factors that influence this atmospheric phenomenon: latitude, altitude and…
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Self-evaluation 10 - The Greek world
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What was the cause of the following events?: Alexander the Great conquered many territories. Philip II conquered the Greek cities. Greece opened new trade routes with the east. Alexander's empire…
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Everyday life in the cities
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3.1. Roman houses There were two types of houses in Roman cities: the domus and the insula. Domus were individual houses of wealthy families. The entrance was a vestibule that led to an interior patio…
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Observe. The Roman city of Timgad
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Look at the photograph and answer the questions: What important open public space characterised Roman cities? What two large roads formed a crossroads in the centre of the city? What were insulae?
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