Arithmetic

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Arithmetic is a simple branch of mathematics. It has to do with calculations that we make in everyday life. All calculations can be done with four basic actions: addition, subtraction, multiplication and division. Arithmetic also includes more complex actions which are made from the four basic actions, such as: raising to a power (done with many multiplications), fractions and percentages (which are results of division). Arithmetic is also the main part of number theory which deals with relations between numbers, for example: which number is divisable by another (the other can be multiplied by something to give the first). It is the basis for calculations in all other branches of mathematics.

[edit] Examples

addition 2 + 5 = 7 \,
subtraction 12 - 8 = 4 \,
multiplication 3 \times 5 = 15
division 28 \over 7 = 4
exponents 3 ^ 4 = 81\,
fractions 3 \over 6 = 1 \over 2

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