Posts Tagged ‘subtract’
Thursday, November 19th, 2009
Overview of Computation Methods
Description
A detailed tutorial on the four basic computation methods. Step by step tutorial including several examples of the four basic computation methods for reference.
Overview
Computation methods are the way you solve expressions and equations. The four basic ones are addition, subtraction, multiplication, and division. Addition and subtraction are inverses of each other, and multiplication and division are inverses of each other. All of them are extensions of counting and can easily be solved without too much effort.
Tags: add, addition, arithmetic, basic, computate, computation, counting, divide, division, method, multiplication, multiply, subtract, subtraction
Posted in Arithmetic | No Comments »
Thursday, November 19th, 2009
Overview of the Additive Identity
Description
A detailed tutorial on how to solve equations using the additive inverse. Step by step tutorial including several examples of how to solve equations with the additive inverse for reference.
Overview
The additive inverse is the inverse of the additive identity – which should be very easy to guess. However, the problem is not guessing the definition of the additive inverse – the problem is knowing what the inverse of the additive identity is. The additive identity states that any number plus zero equals itself. The additive inverse states that any positive number minus its true value or any negative number plus its true value is equal to zero – in other words, that two inverses together equal zero. You solve equations by using the additive inverse.
Tags: add, additive, arithmetic, basic, divide, equations, identity, inverse, itself, multiply, nothing, plus, property, same, subtract, zero
Posted in Arithmetic | No Comments »
Thursday, November 19th, 2009
Overview of the Additive Identity
Description
A detailed tutorial on the additive identity. Step by step tutorial including several examples of the additive identity for reference.
Overview
The additive identity is very similar to the zero properties of multiplication and addition. However, the additive property is only used with addition – which should be easy to tell from the name of this identity. The additive identity states that any number plus zero, or with zero added to it, is equal to itself. The additive property is one of the properties that all teachers expect you to already know, so it is important to learn it.
Tags: add, additive, arithmetic, basic, divide, identity, itself, multiply, nothing, plus, property, same, subtract, zero
Posted in Arithmetic | No Comments »
Thursday, November 12th, 2009
How to Find the Next Term in an Arithmetic Sequence
Description
A detailed tutorial on finding the next term of an arithmetic sequence. Step by step tutorial including several examples of arithmetic sequences for reference.
Overview
Arithmetic sequences are sequences of numbers that are written in a particular pattern. Most problems including an arithmetic sequence don’t include all the terms in the sequence, and you have to find the next one in the sequence. In order to do this, you must find the pattern. The pattern can be anything – the same number could be added, subtracted, mutliplied, or divided from each previous number of the sequence. The previous number could be added to the number after it to come up with the next number. Each number in the sequence could be divisible by the same number. All numbers could be perfect or prime. There are an endless number of patterns, all you have to do is look and then follow that pattern to come up with the next term or terms in the sequence.
Tags: add, arithmetic, divide, mutliply, next, number, pattern, perfect, previous, prime, sequence, subtract, term
Posted in Arithmetic | No Comments »
Tuesday, November 3rd, 2009
How to Find the Determinant
Description
A detailed tutorial on how to find the determinant. Step by step tutorial including several examples of finding the determinant for reference.
Overview
The determinant is a number that is associated with a square matrix. In a mathematical sense, the determinant is a scale factor for measure when the matrix is regarded as a linear transformation. The determinant is denoted by two bars on either side of the matrix, which can be confused with the absolute value of the matrix. The determinant is found by subtracting the products of the diagonals of the matrix, at least in a 2×2 matrix.
Tags: absolute, algebra, determinant, diagonal, factor, linear, matrices, matrix, product, scale, square, subtract, transformation, value
Posted in Algebra | No Comments »
Tuesday, November 3rd, 2009
Rule of Sarrus Explained
Description
A detailed tutorial on the Rule of Sarrus. Step by step tutorial including several examples of the Rule of Sarrus and determinants for reference.
Overview
The Rule of Sarrus is a method used to compute the determinant of a 3×3 matrix. Mathematically stated, if you are given a 3×3 matrix, you can compute the determinant by repeating the first two columns of the matrix behind the third column, so that you have 5 columns in a row. This forms a 3×5 matrix. Then you add the products of the diagonals going from top to bottom (left to right), and subtract the products going from bottom to top (left to right). This can also be used for 2×2 matrices, but the rule used is a little different.
Tags: 2x2, 3x3, 3x5, add, algebra, bottom, column, determinant, diagonal, left, matrices, matrix, product, right, row, rule, sarrus, scheme, subtract, top
Posted in Algebra | No Comments »
Thursday, October 15th, 2009
Difference in Set Theory
Description
A detailed tutorial of difference in set theory. Step by step tutorial including several examples of difference in set theory for reference.
Overview
Difference is what you get after subtracting two numbers – or two sets. As with other examples of subtraction, order is very important for difference in set theory. Unless two sets are identical, you will end up with a different answer depending on the order. Difference is very often used in conjunction with union and intersection of sets or power sets.
Tags: difference, discrete math, element, empty set, intersection, Math, number, order, power set, set, set theory, subset, subtract, subtraction, union
Posted in Discrete Math | No Comments »
Friday, October 2nd, 2009
How to Find the Reference Angle
Description
A detailed tutorial on finding the reference angle. Step by step tutorial with several examples of how to find the reference angle for reference.
Overview
The reference angle is something you run into in precalculus and calculus. The reference angle is only used when working with radian measure, which while being more precise than degree notation, can sometimes be difficult to figure out and out into something you can use when solving an equation. The reference angle uses the unit circle, which has four points of 0, pi/2, pi, 3pi/2, and 2pi. When calculating an angle that is not exact, you place it on your unti circle and find the closest of those points. Subtract them. This is your reference angle.
Tags: Calculus, degrees, Math, pi, radians, reference, reference angle, subtract, unit circle
Posted in Calculus | No Comments »
Tuesday, September 15th, 2009
How to Subtract Decimals
Description
A detailed tutorial on how to subtract decimals. Step by step tutorial including several examples of subtracting decimals for reference. It is a requirement to know how to subtract decimals for all math classes.
Overview
Decimals are really no different from regular numbers when you perform operations on them, but sometimes the numbers in the decimal places can be a little tricky to figure out. The operation we will be talking about is subtraction. The most important thing to remember when doing anything with decimals is to match up the decimal points and add zeros onto the end if you need to. Then just subtract like you normally would, and remember to put your decimal point back in the right place.
Tags: arithmetic, decimal points, decimals, difference, Math, operations, point, subtract, subtraction
Posted in Arithmetic | No Comments »
Tuesday, September 8th, 2009
How to Solve Subtraction Problems with Fractions
Description
This video show how to subtract fractions and mixed numbers that have different denominators. The process is clearly explained. One example problem is provided in the video.
Overview
Subtracting fractions is very similar to adding fractions. The most important part of subtracting fractions is making sure you have an LCD – Least Common Denominator. If your denominators are already the same, then that makes is much easier.
Example: (a/b) – (c/b) = (a – c) / b
The one problem with subtraction is that unlike addition, it does matter which number is bigger. If you are subtracting a smaller number from a bigger number, there is no problem. But if you are subtracting a larger number from a smaller number, you may not know what to do. However, all this does is create a negatuve number. Pretend that your numbers are flipped. Subtract the smallest number from the biggest number. That number is still your answer, but if you had to flip the numbers to get it then you need to put a negative sign in front of it.
Example: (1/2) – (5/2) = (1 – 5) / 2
1 – 5 is obviosuly a bigger number subtracted from a smaller number. Now, to flip these. 5 – 1 = 4. So, 1 – 5 = -4. The answer to our sample problem is -4/2.
Tags: algebra, arithmetic, denominator, fractions, LCD, least common denominator, Math, negative, numerator, positive, subtract, subtraction
Posted in Algebra, Arithmetic | No Comments »
