3.18 Subtraction of negative numbers

Next consider subtraction of a negative number. In terms of Thomas’s piggy bank, subtracting a negative number is the same as taking away one of his IOUs. If his mother says ‘you have been a good boy today so I’ll take away that IOU for £3’ this is equivalent to him being given £3.

So, − (3) = 3. Does this correspond with the number line interpretation of subtracting a negative number?

Consider the evaluation of 8 − 3. Continue to think o
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2.1 Surfaces in space

In Section 2 we start by introducing surfaces informally, considering several familiar examples such as the sphere, cube and Möbius band. We also illustrate how surfaces can be constructed from a polygon by identifying edges. A more formal approach to surfaces is presented at the end of the section.

Figure 3 shows
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Por favor lea la descripción agregada por www.artehistoria.com.

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Castilla y Aragón salen muy fortalecidos del proceso reconquistador, especialmente el primero. Portugal ve en el Atlántico un ámbito propicio para su expansión, más de carácter económicoque militar, mientras que Granada y Navarra apenas pueden luch

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Acknowledgements

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

Course image: Kjetil Korslien in Flickr made available under Creative Commons Attribution-NonCommercial 2.0 Licence.

Except for third party materials and otherwise
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7 Dividing when you have to carry

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 calcula
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5.4 Summary of Part D

Table 3 summarises the main aspects of Part D.

Table 3 Types of law and their effects

Type of lawEffect
Treaties
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