Transcript Exercise 7 - Junta de Andalucía

FRACTIONS
Exercise 1
What fraction of the deposit is left?
What fraction of the deposit has
been used up?
The fuel tank has a capacity of
12 gallons. How much fuel do
we have left? How much have
we used up?
What fraction of the deposit will be
left if we use half of the deposit?
Exercise 2
Un coche híbrido (cuyo motor combina
el uso de gasolina y electricidad)
consume 3 litros de gasolina por cada
100 km recorridos.
Sabemos que en el depósito caben 48
litros.
¿Cuántos km podemos recorrer con la
gasolina disponible?
¿En qué posición estará la aguja tras
recorrer 400 km?
Exercise 3
Music notes
Exercise 3
Music notes
1
1/2
Whole note / Semibreve / Redonda
Half note / Minim / Blanca
1/4
Quarter note / Crotchet / Negra
1/8
Eigth note / Quaver / Corchea
1/16
Sixteenth note / Semiquaver / Semicorchea
1/32
Thirty-second note / Demisemiquaver / Fusa
1/64
Sixty-fourth note / Hemidemisemiquaver / Semifusa
Exercise 3
Music notes
1 1 1 1 1 1 1 1 8
        1
8 8 8 8 8 8 8 8 8
1
1 1


16 16 8
Exercise 4
The total area of the Earth
is approximately 510
millon km2 and the oceans
cover about 360 million
square kilometers.
What fraction of the Earth is covered by the oceans?
What fraction of the Earth is covered by land?
The Atlantic Ocean has a total area of about 108 million km2.
What fraction of the Earth is that? What fraction of the oceans?
Exercise 5
The population of Europe is estimated
to be approximately 700 million.
There are 6300 million people in the
world.
What fraction of the people of the
world are Europeans?
According to Wikipedia, “a century
ago, Europe had nearly a quarter of the
world’s population”. In 1900, the
population of Europe was 325 million.
Has the population of Europe increased
or decreased? What about the fraction
of the European people in the world?
Exercise 6
There are about 1400 millions km3 of water on
the planet Earth.
97
of all that water is in the oceans, and the
100
rest is fresh water.
What fraction of the Earth water is fresh?
How many km3 of fresh water are there?
Exercise 7
The xilophone is a percussion instrument. It
consists of wooden bars of various lengths
that are struck by mallets.
Each bar is tuned to a specific
note of the musical scale. In the
picture, bars with the same color
produce the same note, only one
octave above.
Look at the red bars. The smaller
one is exactly half as long as the
bigger one.
How long are the rest of them?
Exercise 7
DO
SI
LA
SOL
FA
MI
RE
DO
Exercise 7
DO
1 7

2 14
Exercise 7
RE
8 4

14 7
Exercise 7
MI
9
14
Exercise 7
FA
10 5

14 7
Exercise 7
SOL
11
14
Exercise 7
LA
12 6

14 7
Exercise 7
SI
13
14
Exercise 7
DO
14
1
14