To review and consolidate the learning which you have gained from studying this course, you might like to consider the following questions:

• Has studying the course changed your ideas in any way about what a â€˜businessâ€™ is?

• Why do you think that different ways of running a business have developed under English law (e.g. sole trader, partnership, company)?

• What do you think are the advantages and disadvantages of running
Author(s): The Open University

If you were to carry on the business described in Activity 2, you would be carrying on business on your own. You would be what is called a â€˜sole traderâ€™. We will look at the consequences of being a sole trader in a little bit more detail in this section.

However, not all businesses are run by sole traders. There are several different ways in
Author(s): The Open University

In the aftermath of the Second World War there were public disclosures of huge numbers of cases of brutal, inhuman and tyrannical treatment of people, frequently within the civilian populations of occupied countries. Many serious concerns arose about the way in which millions of people had been mistreated at the instigation of or with the connivance or concurrence of government. There was almost universal disgust and condemnation at the disclosures made, together with a general recognition th
Author(s): The Open University

## Activity 30

Carry out the following calculations, without your calculator.

• (a) 3 Ã— (60 + 70).

• (b) (3 Ã— 60) + 70.

• (c) (70 âˆ’ 60) Ã· 5.

• Author(s): The Open University

In order to compare quantities, it is best to express them in the same units.

## Example 10

Three children have just measured their own heights in metric units. Isaac says â€˜My height is 1098â€™, Jasmine says â€˜My height is 112â€™ and Kim says â€˜Mine is 1.1â€™. What units were
Author(s): The Open University

It is important to choose appropriate units, both to have a sense of the size you are talking about and also to avoid having to deal with very large or very small numbers.

For example using the UK decimal system, where Â£1 = 100p (one pound is equivalent to 100 pence), you would probably use pence for prices less than a pound: 50p rather than Â£0.50 and pounds for larger amounts, e.g. Â£2.50 instead of 250p.

For distance, mass and liquid measures, the metric system of units
Author(s): The Open University

## Activity 14

Contour lines on a map show all the points at a given height above sea level. The lines are drawn for each height at 50-metre intervals, and points below sea level are shown by negative heights. The diagra
Author(s): The Open University

In the example below of a straightforward subtraction, in every column the digit at the top of the column is bigger than the digit at the bottom. Click on each step in turn to see how to carry out the calculation.

Active content not displayed. This content requires JavaScript to be enabled.