Hopefully, thinking about how your solution to a mathematical problem might be marked, will help you to produce better solutions for yourself, as well as for somebody else. Now try the quizÂ  and see if there are any areas you need to work on.

Author(s): The Open University

1 You are planning to paint three rooms with total wall areas of 56, 38 and 40 square metres, using paint that comes in tins which claim to cover 15 square metres per tin. How many tins will you need for each room? And how many in total?

<
Author(s): The Open University

How do you write mathematics that can be read and easily understood by anyone else, such as a tutor or another student?

It takes practice, but the following guidelines may be helpful.

• Ensure that what you write consists of sentences. Too many people believe that mathematics is a language which is entirely made up of unfamiliar symbols. It is not. Many symbols act in part merely as abbreviations which, when read, can be translated back into spoke
Author(s): The Open University

Now that youâ€™ve learned how to do subtraction on paper, you might want to practice your new skills.

To practice subtracting whole numbers, including borrowing where necessary, go to the Practice SubtractingÂ  section of the Numbers website and click on Get sum. Then follow the instructions.

To practise subtracting decimals, go to the
Author(s): The Open University

If the number you are dividing by does not go exactly (with no remainder) into the digit you are dividing into, you need to do something called carrying.

Say you want to divide 952 by 7. The process is basically the same as in the previous section. First write it down on paper. Then, to do the calculation, you take each digit from the number being divided in turn, starting with the one on the far left, and see how many times the dividing number, 7 in this case, goes into it. The calcul
Author(s): The Open University

In much of your statistical work, you will begin with data set, often presented in the form of a table, and use the information in the table to produce diagrams and/or summary statistics that help in the interpretation of the data set. However, in practice, much interpretation of data sets can be done directly from an appropriate table of data, or by re-presenting the data in a rather different tabular form. Dealing with data in tables is the subject of this section and the next. By the time
Author(s): The Open University

## Example 1.2 Infants with SIRDS: boxplots

Boxplots are particularly useful for making quick comparisons. The following example relates to birth weights of infants exhibiting severe idiopathic respiratory distress syndrome (SIRDS), and the question â€˜Is it possible to relate the chances of eventua
Author(s): The Open University

All materials included in this unit are derived from content originated at the Open University.

Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence

Author(s): The Open University

The danger of using three-dimensional effects is really brought home when two data sets are displayed on the same bar chart. Table 2 may be thought of as consisting of two data sets, one for male workers and one for female workers. On its own, each of these data sets could be portraye
Author(s): The Open University

Although there may be many occasions when you are given a formula to use, sometimes you may need to devise your own formulas, for example if you use a spreadsheet on a computer at home or at work. This section looks at the process of devising a formula in more detail.

Part of a spreadsheet that has been constructed to record monthly income and expenditure is shown below. It is similar to a balance sheet that you might draw up by hand and includes the monthly income and outgoings, the to
Author(s): The Open University

All written material contained within this unit originated at the Open University.

Author(s): The Open University

1 A new train operator boasts â€˜Train times reduced by 12%â€™. Decrease 90 minutes by 12%. Give your answer as minutes and seconds.

A 12% decrease would red
Author(s): The Open University

test hiearchy
test hiearchy - UNSPECIFIED Keywords:UNSPECIFIED
Author(s): No creator set

Recognizing Chemical Reactions (Chinese Voice Over)
What do all chemical reactions have in common? Most students describe a chemical reaction as an event where an explosion, color change, or a gas is formed. As a prerequisite for this lesson students need only be acquainted with the particulate nature of matter. The main learning objective is the recognition that all chemical reactions create new molecules and that in a chemical reaction the original atoms get rearranged, bonding together in different ways. Overall, the lesson will take about 45-
Author(s): No creator set

Literary Festival 2016: To Boldly Go: what Star Trek tells us about the world [Audio]
Speaker(s): Professor MichÃ¨le Barrett, Duncan Barrett, Professor Barry Buzan, Professor Steven French | Celebrating Star Trekâ€™s 50th anniversary, our panel will explore what this enduring science fiction series can tell us about attitudes to international relations, science and society. MichÃ¨le Barrett is Professor of Modern Literary and Cultural Theory at Queen Mary University, London and author, with her son Duncan Barrett of Star Trek: the Human Frontier. Her recent work has focused on t
Author(s): No creator set

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## Study another free course

There are more thanÂ 800 coursesÂ on OpenLearnÂ for you to choose from on a range of subjects.Â

Find out more
Author(s): The Open University

balance
balance - John Savage Keywords:UNSPECIFIED
Author(s): No creator set

Prof David Nutt: Time To Put Science At The Heart Of UK Drug And Alcohol Policy?
In this IPR Public Lecture, Professor David Nutt - Edmund J Safra Professor of Neuropsychopharmacology and Head of the Centre for Neuropsychopharmacology at Imperial College London, as well as former Chair of the Advisory Committee on the Misuse of Drugs - explores the ways in which evidence is being misused to stop rational regulations for alcohol and tobacco and, simultaneously, to impose unnecessary and potentially harmful sanctions on other drugs. He also addresses new ways we can approach t
Author(s): No creator set

Literary Festival 2016: Worlds Elsewhere: global Shakespeare [Audio]
Speaker(s): Ben Crystal, Andrew Dickson, Dr Varsha Panjwani | Shakespeare has been translated into virtually all the worldâ€™s most commonly spoken languages. His plays are performed in a rich variety of theatrical traditions. How did he become the global phenomenon he is today? And how is his work received and interpreted across the world? Ben Crystal (@bencrystal) is an actor, writer and producer. He is the artistic director of Passion in Practice and its Shakespeare Ensemble. Andrew Dickson (
Author(s): No creator set

No promises, just possibilities
In this Designability lecture, Kate Allatt shares an inspiring story of about self-management, patient engagement, dignity and future assistive technology opportunities. Kate's motto is to never lower patient recovery expectations because there are no promises, just possibilities. She is the author of â€˜Running Free â€“ Breaking out of Locked In Syndrome' and 'Extraordinary Woman Winner 2011'.
Author(s): No creator set