Measuring devices 1

1
Measuring devices 1
Below is a selection of measuring devices. Can
you name them?
1.
2.
3.
4.
5.
6.
7.
What other measuring devices can you name?
2
Measuring devices 2
Which tool would you use to measure each of the
following
waist size height of a door 5 g of sugar 80 g
of pasta length of a jotter length of the
school corridor 500 ml of water?
3
Measuring length 1
When measuring length, the main units we use are
millimetres (mm), centimetres (cm) and metres (m).
0.5 cm
2 cm
2.8 cm
3.5 cm
4 cm
4.6 cm
4
Measuring length 2
What length are these arrows pointing to?
5
Measuring length 3
If you are measuring something that is very
small, it can be useful to measure in millimetres.
There are 10 millimetres in a centimetre and they
are usually written as mm.
Most rulers have centimetres and millimetres on
them.
5 mm
20 mm
28 mm
32 mm
38 mm
44 mm
6
Measuring length 4
What lengths are these arrows pointing to?
a
b
c
d
e
f
g
7
Measuring length 5
If you are measuring longer distances you might
use metres.
1 metre is made up of 100 cm and is often written
as m for short.
There are different devices that you can use to
measure metres depending on how big an object is.
You could use
metre stick
measuring tape
trundle wheel
8
Measuring weight 1
When measuring weight, the main units we use are
grams (g) and kilograms (kg).
You use grams to measure lighter things and
kilograms for heavier things.
You can also use ounces, pounds and stones to
measure weight.
We use scales to measure weight.
These scales are pointing to 550 g
These scales are pointing to 200 kg
9
Measuring weight 2
2.
1.
What weights do these scales show?
4.
3.
10
Measuring weight 3
2.
1.
0
600
100
500
200
kg
300
400
What weights do these scales show?
4.
3.
11
Measuring weight 4
These weighing scales shows a weight of 66 kg.
12
Measuring weight 5
What weight do these scales show in kilograms?
1.
2.
kg
kg
4.
3.
kg
kg
13
Measuring volume 1
When measuring volume, the main units we use are
millilitres (ml) and litres (l).
For smaller amounts of liquid we use millilitres
(ml) and for larger amounts we use litres (l).
We can use a measuring jug to measure volume.
This jug has 300 ml of liquid in it.
This jug has 4 l of liquid in it.
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Measuring volume 2
1.
2.
What volume of liquid is in each jug?
4.
3.
15
Measuring volume 3
1.
2.
5 l
5 l
4 l
4 l
3 l
3 l
2 l
2 l
What volume of liquid is in each jug?
1 l
1 l
4.
3.
5 l
5 l
4 l
4 l
3 l
3 l
2 l
2 l
1 l
1 l
16
Measuring quantities 1
When measuring it is not always whole values that
you measure.
To work out half of something, it is divided into
2 parts that are each the exact same.
Half of 2 metres is 1 metre because 1 1 metres
gives you 2 metres.
Half of 4 litres is 2 litres because 2 2 litres
gives you 4 litres.
Half of 6 metres is 3 metres because 3 3 metres
gives you 6 metres.
Half of 6 kg is 3 kg because 3 3 kilograms
gives you 6 kilograms.
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Measuring quantities 2
To work out how long half a metre is, you have to
work in centimetres.
There are 100 cm in a metre, so half a metre is
50 cm because 50 cam 50 cm 100 cm or 1 metre.
To work out how much half a litre is, you have to
work in millilitres.
There are 1000 ml in a litre, so half a litre is
500 ml because 500 ml 500 ml 1000 ml or 1
litre.
To work out how heavy half a kilogram is, you
have to work in grams.
There are 1000 g in a kilogram, so half a
kilogram is 500 g because 500 g 500 g 1000 g
or 1 kg.
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Measuring quantities 3
Work out half of the following values

1. 12 cm
2. 8 kg
3. 6 mm
4. 10 l
5. 14 m
6. 4 l
7. 16 cm
8. 1 m
9. 1 kg
10. 1 l

19
Measuring quantities 4
You may also want to work out a quarter of
something.
To do this, you divide it into 4 parts that are
exactly the same.
A quarter of 4 metres is 1 metre because 1 1
1 1 metres gives you 4 metres.
A quarter of 8 metres is 2 metres because 2 2
2 2 metres gives you 8 metres.
A quarter of 16 metres is 4 metres because 4 4
4 4 metres gives you 16 metres.
20
Measuring quantities 5
To work out how long a quarter of a metre is, you
have to work in centimetres.
There are 100 cm in a metre, so a quarter of a
metre is 25 cm because 25 25 25 25 cm 100
cm or 1 metre.
To work out how much a quarter of a litre is, you
have to work in millilitres.
There are 1000 ml in a litre, so a quarter of a
litre is 250 ml because 250 250 250 250 ml
1000 ml or 1 litre.
To work out how heavy a quarter of a kilogram is,
you have to work in grams.
There are 1000 g in a kilogram, so a quarter of a
kilogram is 250 g because 250 250 250 250 g
1000 g or 1 kg.
21
Measuring quantities 6
Work out what a quarter of the following values
would be

1. 12 cm
2. 8 m
3. 4 kg
4. 16 m
5. 20 l
6. 40 mm
7. 100 cm
8. 24 g
9. 1 l
10. 1 kg

22
Measuring quantities 7
You may also want to work out what double
something is.
To do this, you add the number to itself.
To double 1 metre, you add 1 1 2 metres.
To double 2 litres, you add 2 2 4 litres.
To double 3 metres you add 3 3 6 metres.
To double 4 kilograms you add 4 4 8 kilograms.
To double 100 millilitres you add 100 100 200
millilitres.
23
Measuring quantities 8
Work out what double the following values would
be

1. 12 g
2. 8 m
3. 6 mm
4. 10 m
5. 14 l
6. 4 mm
7. 16 cm
8. 1 m.
9. 9 kg
10. 7 ml