Economists and technicians often have to calculate the percentage of. Accountants need to correctly calculate the taxes, the bankers income (interest) on deposits, the engineering of the tolerance parameters. In all such cases it is necessary to consider the interest from some known values.

To calculate the percentage ofs we have often. For example, to determine the overpayment on the loan or calculate interest on arrears, or to know the gross margins of the company, knowing its turnover and trading margin. Such a lot of tasks in daily life. It would be funny every time to make the proportions and percentages in a column. Moreover, for calculations we do not need a complex programmable calculator.

The percentage in Latin ("pro centum" means one-hundredth. So if you want to find a certain percentage of a certain amount of money, it means that it is necessary to determine how many hundredths of the sum contains the specified percentage. If in mind to not count it turns out, the easiest way to calculate a percentage using a calculator.

When solving physics problems often have to translate physical quantities from one unit of measure to another. Typically, this is similar, so-called a decimal fraction and multiples of units, differing only in the multiplier. For example, grams and kilograms, meters, and kilometers. In practice, however, it is sometimes necessary to convert a rather disparate units of measurement, such as liters and kilograms or square meters.

With the need to calculate the percent of people faces constantly, sometimes even without realizing it. And not only on the math, but, for example, trying to determine what part of total family income to make utility payments or payment for a kindergarten. And many need to count the percent baffled.

Vector geometry is a directed line segment, which is characterized by an ordered pair of points in Euclidean space. The length of the vector call the number that is equal to the length of the segment forming vector.

The diameter of a circle is a line segment connecting the pair most remote from each other points of the circle passing through the center of the circle. The word "diameter" comes from the Greek word "diametros" - cross. Typically, the diameter is denoted by the Latin letter D or the icon Ø.

When working with measurements, you often have to translate them from one system of measurement to another. As a rule, homogeneous units, differing only in the multiplier, for example, meters and centimeters. However, it is sometimes necessary to translate a rather disparate units, for example, liters into kilograms or cubes in the squares.

Some students started to learn solid geometry, confusing three-dimensional and flat shape. For example, the ball is sometimes called a circle, cube, square, and rectangular parallelepiped – just a rectangle. Accordingly, such students often try to calculate the volume of a rectangle or square of a cube.

The calculation of the amount of bodies is one of the classic types of problems of engineering and applied science. Generally this is not a trivial task. Analytical formulas for calculating volumes of complex bodies can be very cumbersome. However, the volume of a number of bodies are calculated very simply. Easy to calculate the volumes of many solids of revolution. For example, to calculate the volume of the tube, producing a number of simple mathematical operations.

Everything is relative. The attitude of some of the variables to each other can be expressed in percent. For example, considering the percentage of the liquid from the main mass contains 1 kg of tomatoes and cucumbers, you will know that it will be juicier.

Call the hypotenuse side in a right triangle that lies opposite the right angle. The hypotenuse is the longest side in a right triangle. The other sides in a right triangle are called legs.

The triangle is the simplest polygon, bounded on the plane, three points and three segments connecting pairs of these points. The angles in a triangle are acute, obtuse and straight. The sum of the angles in a triangle is constant and equal to 180 degrees.

Often in life we have to use simple mathematical operations quickly and without the aid of electronic calculators. For example, the calculation of wages should be deducted from the total monetary amount of thirteen percent. How to do it? After subtracting different types of numbers can not, without a certain conformity between them. And it can be done, knowing a number of simple actions.

Under the cubic capacity of the room is usually referred to as its volume, expressed in cubic meters. If you know the basic parameters of the room (length, width, and height), then calculate its cubic capacity is very simple. However, if the structure has a complex shape, then calculate its volume is quite difficult.

Technical and economic calculations, sometimes you want to subtract from the number the percentage. For example, the characteristics of many electronic components defined as: nominal value +- a percentage of the nominal value. When issuing the employee a wage out of it you need to hold 13% income tax. It is easier to subtract the percentage of "accounting" calculatore – do not even have to produce any intermediate calculations.

To obtain square meters cubic is the problem of computing the volume of the figure at a given (or found) the square base of the figure. Let us consider how to calculate the volume, knowing the area of the base.

The world in which we live triangular. So all bodies in the nature of the space. Volume - a physical quantity, numerically showing the dimensions of the body, it is measured in cubic meters, centimeters, etc., and also in liters, milliliters, etc. to calculate the volume of the body, neobhodimo to see its shape. Depends on the method of calculation.

The multiplication in column one of the first and the most important operations, which studies the young learner in school. Without a clear knowledge and understanding of the whole sequence of actions when multiplying two numbers it is impossible to acquire further knowledge of mathematics. To fully learn how to multiply in a column can only be a multiple repetition of this operation. Performing the computation in a column, the student trains memory and attention. This allows further easier to concentrate on any task. To multiply numbers in a column need after studying the multiplication tables.

A cylinder is called a geometric solid formed by a cylindrical surface bounded by two parallel planes. The cylinder obtained by rotating a rectangle around any of its sides is called a straight. With just a few simple methods you can quite accurately find the volume of a cylinder.

Even those who are not financier and does not work in the accounting Department, often need to use such a thing as "percentage", and to count it, for example, in order to learn the amount of the tax. Perhaps life is your relationship with mathematics was not very good, but that doesn't mean you can't, using the simplest methods to calculate the percentage.

When solving physical problems, all quantities are adjusted to one system of measurement. As a rule, it uses the SI system (system international). This allows you to use in the calculations only the numerical values of physical quantities. In practice, however, often have to translate each other quite diverse physical quantities, for example, convert kg/h to m3/h.

To find the sides of the triangle, you must know the lengths of two sides and the size of one angle. Or Vice versa - the length of one side and the values of the two angles. The value of the third angle is easily calculated from the equality of the sum of the angles of a triangle is 180 degrees.

Already from the name "rectangular" triangle, it becomes clear that one angle is 90 degrees. The remaining angles can be found by remembering some simple theorems and properties of triangles.

The segment connecting two points of the circle and passing through its center, has a constant ratio with a closed line with no self-intersections, all points of which are equidistant from the center. It is possible to formulate simpler: the diameter of any circle is about 3 times less than its length.

The equation is an identity, where among the known members of one hides the number you want to put instead of the Latin letters, to the left and right sides came out of the same numeric expression. To find it, need to move in the same direction all known members in the other all unknown terms in the equation. How to solve a system of two such equations? Separate – can not be linked to a desired value from the system with each other. You can do this three ways: method substitution method addition method of graphing.

Calculating the square roots scared some students at first. Let's see how they need to work and what to pay attention to. Also we give their properties.

Suppose you face the task: how many boxes can be placed in the trunk of your car, if the volume is already known? The task is simple: calculate the volume of each box separately, fold and get the full volume of your shipment. Now you have to solve the minimum problem: calculate the volume of the box.

By definition, from geometry, a triangle is a figure consisting of three vertices and three pairs of connecting segments. There are many formulas for calculating the areas of triangles, each of triangles you can use a special formula.

Cuboid is a type of polyhedron having 6 faces, each of which is a rectangle. In turn, a diagonal is a segment that connects opposite vertices of a parallelogram. Its length can be found by two methods.