By the end of this unit you will be able to:

• divide one number by another;

• divide using decimals;

• practise your division skills.

Author(s): The Open University

Do you want to improve your ability to divide one number by another without having to rely on a calculator? This unit will help you get to grips with division and give you some practice in dividing numbers.

You donâ€™t need to complete the whole unit if only certain sections are relevant to you. I start with the basics, where youâ€™ll have the opportunity to get some practice in dividing small numbers in your head. Then I deal with dividing bigger numbers and decimals. If you are confid
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

## Boxplots of family sizes

The table below contains data on the sizes (numbers of children) of the completed families of two samples of mothers in Ontario. One sample of mothers had had fewer years of education than the other sample (si
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

Histograms provide a quick way of looking at data sets, but they lose sight of individual observations and they tend to play down â€˜intuitive feelâ€™ for the magnitude of the numbers themselves. We may often want to summarize the data in numerical terms; for example, we could use a number to summarize the general level (or location) of the values and, perhaps, another number to indicate how spread out or dispersed they are. In this section you will learn about some numerical summaries
Author(s): The Open University

In this unit, you have looked at a variety of problems all of which involved using patterns or formulas and you have also extended some of your strategies for solving problems. One of the first steps in tackling any problem is to check that you understand both the problem and the information you have been given. This step can concentrate on what the question means. However, this can also involve looking up or checking on mathematical terms, notation or definitions as in Goldbach's conjecture.
Author(s): The Open University

According to Section 7.2 axons obtain an elixir from targets at their synapses.

Confirmation that there is indeed an elixir came from a series of events that reveals how much of science really works. Elmer Bucker, working with Hamburger in the mid-1940s, had removed a limb bud from a chick and replaced it with a tumour from
Author(s): The Open University

Virtual Maths Data Handling - Light Survey
Exercises and resources for conducting a Light Intensity Survey. "To measure the levels of light in a particular area, we need to use a device called a Light Meter, which measures the intensity of light in the vicinity of the sensor and displays the reading."
Author(s): Leeds Metropolitan University

While we are beginning to understand the underlying molecular and cellular changes that take place in the ageing brain, the consequences of these changes are all too familiar. As people age, their mental competence may change and their ability to cope with the demands of everyday life may alter. A decline in the spee
Author(s): The Open University

Another way to tackle unfamiliar words is to start a â€˜concept cardâ€™ system, using index cards. When you meet a word which seems important, take a new card and write the word at the top, followed by any useful information you have found. File the cards alphabetically and add details as you come across new information. (It is worth getting an index card box anyway, then you can try out various ways of using it to organise your studies.)

Author(s): The Open University

The approach begins with a situation in which one or more people perceive that there is a problem. It will not be possible to define the problem or its setting with any precision and, in any event, the different people involved will have different ideas.

Author(s): The Open University

Presidents' Day Â -Â  A Tour of Monticello
A three minute video that shows his home in this tour of Monticello.
Author(s): No creator set

All of the animals described in this course are members of the mammalian order Rodentia. The rodents are widely regarded as amongst the most successful of all the mammalian groups. We will examine some features of rodent biology that contribute to their success, in particular their exploitation of a unique range of plant foods, especially seeds, wood and roots. While focusing on rodent feeding behaviour and reproduction, we will also be exploring some more general ideas concerning the origin
Author(s): The Open University

The energy carried by ocean waves derives from a proportion of the wind energy transferred to the ocean surface by frictional drag. So, ultimately it stems from the proportion of incoming solar energy that drives air movement. Just how much energy is carried by a single wave depends on the wind speed and the area of ocean surface that it crosses; wave height, wavelength, and therefore wave energy, are functions of the distance or fetch over which the wind blows. Not surprisingly the ma
Author(s): The Open University

Bear in mind that photographs are artefacts. This means that they are more than just images. The photographer, the process and the packaging all add something to our understanding of the role of the photograph. So, for example, the mount can indicate its purpose (exhibition wall, domestic display, album and so on) and the significance attached to the article in its time. The physical properties of a mount, such as the quality of the card or style of printing, can distinguish top-of-the-range
Author(s): The Open University

This course is from our archive and it is an adapted extract from Environmental Control and Public Health (T210) which is no longer in presentation. If you wish to study formally at The Open University, you may wish to explore the courses we offer in this curriculum area.

Author(s): The Open University

How do financial markets match providers with users, and how efficiently does the market determine prices? Financial markets can be notoriously volatile, and the stock market is possibly the most volatile of them all. This is after all the place where, depending on skill or on luck, investors either â€˜make a killingâ€™ or â€˜lose their shirtsâ€™. But which does it depend on â€“ skill or luck? Or does it depend on a mixture of the two? In this unit, you will find the answers to these key que
Author(s): The Open University

OpenLearn Scotland
This unit is intended to be of interest not only to people living in Scotland but to anyone wishing to know more about Scottish society and culture. It brings together a collection of free educational resources relevant to Scotland. The resources within this unit cover a wide range of subject areas, including education, environment, technology, history, law, literature, politics, social care and social sciences.Author(s): Creator not set

Why maps are made
Cars have sat nav systems, mobile phones use GPS: maps are important in everyday life whether captured by aerial photography, satellite imagery or simply drawn. This unit looks at how we read and evaluate the information in maps and assesses the values embedded within them. From mental maps to public transport and street maps: how do they affect your life? Fir
Author(s): Creator not set