Measuring UnitsUnderstand and use approximate equivalences between metric units and common imperial units. 
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❎Inches  questions requiring the ability to make rough conversions between centimetres and inches.
Pounds  questions requiring the ability to make rough conversions between units of weight.
Pints  questions requiring the ability to make rough conversions between units of capacity.
Miles  questions requiring the ability to make rough conversions between miles and kilometers.
Mixed  questions requiring the ability to estimate the best measures and units.
Imperial Units  Learn about common imperial units and how they relate to other units of measurement.
More on this topic including lesson Starters, visual aids, investigations and selfmarking exercises.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
See the National Curriculum page for links to related online activities and resources.
Approximate Equivalents 1 mile = 1.6 km1 metre = 39.37 inches1 foot = 30.5 cm1 inch = 2.54 cm1 kg = 2.2 lb1 gallon = 4.5 litres1 litre = 1.75 pints1 tonne = 1000 kg 
Metric Prefixes mega 1000000kilo 1000hecto 100deca 10deci 0.1centi 0.01milli 0.001micro 0.000001 
Imperial 1 foot = 12 inches1 yard = 3 feet1 mile = 1760 yards1 pint = 20 fluid ounces1 gallon = 8 pints1 pound = 16 ounces1 stone = 14 pounds1 ton = 2240 pounds 
A litre of water's a pint and threequarters.
Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can doubleclick the 'Check' button to make it float at the bottom of your screen.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
Just when I thought I knew all of the imperial units I heard Matt Parker (Standup Maths) list them all, even the more obscure ones, in this wonderful monologue. When you hear their names and their relative sizes you cannot help but be grateful for the metric system which is more common today.
This audio excerpt is from an excellent podcast from BBC Radio 4 called More or Less: Behind the Stats in which Tim Harford tries to make sense of the statistics which surround us. It's well worth a listen if you have an interest in mathematics and statistics and provides real world examples of the maths we learn in school.
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