# Imperial Units

## Units of weight

Ton was standardised in the 13th century and should not be confused with the metric tonne that has a different spelling.

Stone derives from the use of stones for weights, a practice that dates back into antiquity

Pound is descended from the Roman libra (hence the abbreviation lb). The English word pound is derived from German Pfund, Dutch pond, and Swedish pund.

Ounce derived almost unchanged from the uncia, an ancient Roman unit of measurement.

1 ton = 160 stones1 stone = 14 pounds1 pound = 16 ounces

This is level 2: units of weight. You will be awarded a trophy if you get at least 14 correct and you do this activity online.

 1 What is the abbreviation or symbol used for pounds? ☐ select tstlboz ☐ ✓ ✗ 2 What is the abbreviation or symbol used for tons? ☐ select tstlboz ☐ ✓ ✗ 3 What is the abbreviation or symbol used for ounces? ☐ select tstlboz ☐ ✓ ✗ 4 How many ounces are in a stone? ☐ ☐ ✓ ✗ 5 How many pounds are in a ton? ☐ ☐ ✓ ✗ 6 How many ounces are in a ton? ☐ ☐ ✓ ✗ 7 How many ounces are in 4 pounds? ☐ ☐ ✓ ✗ 8 How many pounds are in 2 stones? ☐ ☐ ✓ ✗ 9 How many stones are in 2 tons? ☐ ☐ ✓ ✗ 10 How many pounds are equivalent to 128 ounces? ☐ ☐ ✓ ✗ 11 How many stones are equivalent to 84 pounds? ☐ ☐ ✓ ✗ 12 How many stones are equivalent to 1568 ounces? ☐ ☐ ✓ ✗ 13 I planned to pick three stones of apples but only managed half of that. How many pounds of apples did I pick? ☐ ☐ ✓ ✗ 14 A small rowing boat weighs four and a half stones.How many ounces is that weight equivalent to? ☐ ☐ ✓ ✗ 15 How many 8oz bags of sweets can be obtained from a three pound jar of sweets? ☐ ☐ ✓ ✗ 16 Lofty was seven stone five pounds when he first joined Aston Cottage School. He is now eight stone four pounds. By how many pounds has his weight increased? ☐ ☐ ✓ ✗ 17 Subtract 2st 9lb from 8st 4lb giving your answer as a number of pounds. ☐ ☐ ✓ ✗ 18 A bag of Cakewell flour weighs one pound and two ounces. What is the total weight, in pounds, of 24 bags of this flour? ☐ ☐ ✓ ✗ 19 How many times heavier is a rock weighing eight stones than a rock weighting eight pounds? ☐ ☐ ✓ ✗ 20 Find three quarters of six tons. Give your answer as a number of stones. ☐ ☐ ✓ ✗
Check

In the United Kingdom, the (Imperial) ton is defined as 2240 pounds.

In the United States and Canada, a ton is defined to be 2000 pounds!

This exercise refers to the United Kingdom ton.

This is Imperial Units level 2. You can also try:
Level 1 Level 3

## Instructions

Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

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## Go Maths

Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths page is an alphabetical list of free activities designed for students in Secondary/High school.

## Maths Map

Are you looking for something specific? An exercise to supplement the topic you are studying at school at the moment perhaps. Navigate using our Maths Map to find exercises, puzzles and Maths lesson starters grouped by topic.

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## Description of Levels

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Level 1 - Units of length

Level 2 - Units of weight

Level 3 - Units of capacity

Exam Style Questions - A collection of problems in the style of GCSE or IB/A-level exam paper questions (worked solutions are available for Transum subscribers).

More on this topic including lesson Starters, visual aids, investigations and self-marking exercises.

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## Curriculum Reference

See the National Curriculum page for links to related online activities and resources.

## Conversion Information

1 mile = 1760 yards1 yard = 3 feet1 foot = 12 inches

1 ton = 160 stones1 stone = 14 pounds1 pound = 16 ounces

1 gallon = 4 quarts1 quart = 2 pints1 pint = 20 fluid ounces

## Compared to metric units

The sign ≈ means approximately equal to.

1 inch ≈ 2.5cm

5 miles ≈ 8 km

2.2 lb (pounds) ≈ 1kg

1.75 pints ≈ 1 litre

1 gallon ≈ 4.5 litres

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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.

## Matt Parker's Imperial Units

More or Less Podcast Matt Parker's Website Transum Podcast

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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