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# Measures

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```									       METRIC MEASURES
 Know the  different units for length, weight,
capacity (also in abbreviated form)
 Be able to convert from one metric unit to
another
 Have a rough idea of imperial to metric
conversions
Metric Measures
distance / length / width / height

mm, cm, m, km
millimetres
centimetres
metres
kilometres
Some rough measurements
 a ruler

 the height of   a man

 the height of   a house

 the distance to   Marble Arch

 How far   can you walk in 20 minutes
Some common conversions to
memorize

 10mm =  1cm
 100cm = 1m = 1000mm
 1000m = 1km
 1m ≈ 3feet =1 yard
 8km ≈ 5 miles
 30cm ≈ 12 inches=1foot
Metric Conversions
 by 10     by 100    by 1000

mm         cm     m         km

x by 10    x by 100    x by 1000
Change these units
23cm =      230 mm

96mm =       9.6     cm

120cm =         1.2    m

2.53m =      253 cm

4500m =        4.5   km

0.75km =      750   m
Change these units using
intermediate steps
1238mm =    123.8   cm   1.238    m

14000cm =    140 m       0.14    km

24500cm =     245 m      0.245 km
distance / length / width / height
   I know roughly which units to use to estimate a
length

   I can change one unit to the next by multiplying or
dividing by 10, 100 or 1000 correctly

   5 miles ≈ 8 km

   The width of my little finger ≈ 1 cm

   A ruler is 30cm ≈ 12 inches=1 foot
Metric Measures
Capacity/volume

ml, cl, l, kl
millilitres
centilitres
litres
kilolitres
Some rough measurements
 a tea   cup

 the petrol    tank of a car

 a teaspoon

 the bath

A   fish tank
Some common conversions to
memorize

 10ml = 1cl
 100cl = 1l = 1000ml
 1000l = 1kl
 1l = 1000cm³
Conversions
 by 10     by 100    by 1000

ml         cl      l        kl

x by 10    x by 100   x by 1000
Change these units
23cl =       230 ml

96ml =           9.6 cl

120cl =          1.2 l

2.53l =        253 cl

4500l =            4.5 kl

0.75kl =       750 l
Change these units using
intermediate steps
1238ml =    123.8 cl   1.238 l

14000cl =    140 l     0.14 kl

24500cl =     245 m    0.245 kl
Capacity/volume
   I know roughly which units to use to estimate a
volume or capacity of a container

   I can change one unit to the next by multiplying or
dividing by 10, 100 or 1000 correctly

   2 pints ≈ 1 litre

   1 litre = 1000cm3

   4.5 litres ≈ 1 gallon
Other measures - Area
Some
Area                                    formulas
Some units
   Tape measure                        r   2

   Square units       cm2, sq. cm.     lxw

   Larger - Smaller    m2, sq. m.      bxh
km2, sq. km.
2
Some Areas
Area of a football pitch
100m by 60m
= 6000 m2             Area of a postage
stamp 2cm by 3cm
= 6 cm2
Area of a bedroom
3.7m by 2.5m
= 9.25m2
Some Areas of Countries
Albania:                 Angola:
total: 28,748 sq km      total: 1,246,700 sq km
land: 27,398 sq km       land: 1,246,700 sq km
water: 1,350 sq km       water: 0 sq km

Afghanistan:             Anguilla:
total: 652,000 sq km     total: 91 sq km
land: 652,000 sq km      land: 91 sq km
water: 0 sq km           water: 0 sq km
Other measures - speed
Velocity or speed is distance per unit of time

   Metres per second        Space craft

   Miles per hour        Cars in Britain

   Kilometres per hour       Cars in Europe

   Centimetres per minute      Speed of a slow ant
Other measures - salaries
Salaries or wages is amount of money per unit of time or
even per item

   £20 000 per year

   £6.25 per hour

   £0.10 per paper delivered

   £2.60 per 100 envelopes stuffed
Sometimes
known as piece
work
Other measures - Volume
Volume or capacity

   Amount of space in a box        cm3 or m3
   Amount of air in a room          m3
   Amount of water in the pool     litres or m3

   Amount of helium in a balloon     cm3 or m3
Other measures - Volume
Some
formulas
4
   Tape measure                    r 3
3
   Cubic units
lxwxh
   1 litre is 1000 cm3
Cross section of a prism
times the length of a prism

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