Welcome to Mathematics
January 27, 2022
Thursday
Classroom Expectations:
• Be on time.
• Take down notes.
• Wear your school uniform / school appropriate
clothes.
• Go to the toilet during the 10 minutes break.
• Always mute your microphone,
unless you need to speak.
Unit Test
• Friday, January 28, 2022
• Pages 88 to 107
Imperial and Metric Systems
of Measurement
• Convert imperial to metric units and vice
versa.
REVISION
Metric measurements
All metric measures are based
on 10, 100 and 1000 which makes
it a lot easier to calculate
length, mass and capacity.
Imperial units
• What are Imperial units of length?
inch, foot/feet, yard, mile
12 inches = 1 foot,
3 feet = 1 yard,
1760 yards = 1 mile
Imperial units
• What are imperial units of mass?
Ounce (oz), pound (lb), stone, hundredweight
(cwt), ton
16 oz = 1 lb,
14 lb = 1 stone,
8 stones in 1 cwt,
160 stone = 1 ton
20 cwt = 1 ton
Imperial units
• What are imperial units of capacity?
Pint, gallon
8 pints = 1 gallon
Let’s Get Started
On the next slide, six metric to imperial
conversions will appear. You will have 2
minutes to memorise as many as you can –
without writing them down!
Converting Metric to Imperial
1kg = 2.2 pounds
1 litre = 1.75 pints
4.5 litres = 1 gallon
8 km = 5 miles
30 cm = 1 foot
2.5cm = 1 inch
Converting Metric to Imperial
1kg = 2.2 pounds
What’s missing?
1 litre = 1.75 pints
4.5 litres = 1 gallon
8 km = 5 miles
30 cm = 1 foot
2.5cm = 1 inch
Converting Metric to Imperial
1kg = 2.2 pounds
What’s missing?
1 litre = 1.75 pints
4.5 litres = 1 gallon
8 km = 5 miles
30 cm = 1 foot
2.5cm = 1 inch
Converting Metric to Imperial
1kg = 2.2 pounds
What’s missing?
1 litre = 1.75 pints
4.5 litres = 1 gallon
8 km = 5 miles
30 cm = 1 foot
2.5cm = 1 inch
Converting Metric to Imperial
1kg = 2.2 pounds
What’s missing?
1 litre = 1.75 pints
4.5 litres = 1 gallon
8 km = 5 miles
30 cm = 1 foot
2.5cm = 1 inch
Converting Metric to Imperial
1kg = 2.2 pounds
What’s missing?
1 litre = 1.75 pints
4.5 litres = 1 gallon
8 km = 5 miles
30 cm = 1 foot
2.5cm = 1 inch
Converting Metric to Imperial
1kg = 2.2 pounds
What’s missing?
1 litre = 1.75 pints
4.5 litres = 1 gallon
8 km = 5 miles
30 cm = 1 foot
2.5cm = 1 inch
Converting Metric to Imperial
1kg = 2.2 pounds
What’s missing?
1 litre = 1.75 pints
4.5 litres = 1 gallon
8 km = 5 miles
30 cm = 1 foot
2.5cm = 1 inch
Conversion between metric and
imperial measurements - length.
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•
•
•
•
•
1 centimetre = 0.394 inches
1 inch = 2.54 centimetres
1 metre = 3.281 feet
1 foot = 0.3048 metres = 30.48 cm
1 mile = 1.609 kilometres
1 kilometre = 0.621 mile
Conversion between metric and
imperial measurements - mass.
•
•
•
•
•
•
1 gram = 0.035 ounces
1 ounce = 28.35 grams
1 pound = 0.45 kilograms
1 kilogram = 2.20 pounds
1 stone = 6.35 kilograms
1 kilogram = 0.156 stones
Conversion between metric and
imperial measurements - capacity.
•
•
•
•
1 pint = 0.568 litres
1 litre = 1.760 pints
1 gallon = 4.546 litres
1 litre = 0.220 gallons
Converting Metric to Imperial
Example 1: Convert 500 millimeters to inches:
Converting Metric to Imperial
Example 2: Convert 500 millimeters to feet:
Converting Metric to Imperial
The largest bubble gum ball ever
blown had a diameter of 20
inches.
How wide is this in centimetres?
5 miles = 8 km
2.2 pounds = 1 kg
1.75 pints = 1 litre
1 gallon = 4.5 litres
30cm = 1 foot
1 inch = 2.5 cm
Converting Metric to Imperial
The World’s longest road
bridge is approximately 34
miles long.
How long is this in kilometres?
5 miles = 8 km
2.2 pounds = 1 kg
1.75 pints = 1 litre
1 gallon = 4.5 litres
30cm = 1 foot
1 inch = 2.5 cm
Plenary
The longest ears on a dog
measured 35cm each.
What is this in inches?
The heaviest weight anyone has ever lifted with
their tongue is 12kg. How heavy is this in
pounds?
The World’s largest pizza base spun in 2
minutes was 34 inches wide. How wide is this
in centimetres?
The largest ever egg from a living bird
weighed approximately 2.5kg. What is this in
pounds?
The World’s widest mouth measure 6.8 inches.
How wide is this in centimetres?
The World’s largest bottle of cooking oil holds
approximately 700 gallons. How many litres is
this?
The World’s narrowest street is 30cm wide.
What is this in inches?
The longest piece of French knitting ever made
was 13 miles long. How far is this in kilometres?
The World’s narrowest street is 30cm wide.
What is this in inches?
The greatest weight supported whilst skipping
a rope 10 times is about 396 pounds. What is
this in kilograms?
The furthest distance anyone has ever travelled
with a pool cue balanced on their chin is 1.6km.
What is this in miles?