The Advantages of Online Scientific Calculator

!±8± The Advantages of Online Scientific Calculator

In the olden days, people used to calculate using objects and items such as sticks, leaves or even beans. However, this will cause misunderstanding and at times, unfairness would happen because it depends on the honesty of the person who is doing the counting. So, to solve this problem, the inventor had come out with abathia, the first handmade calculator made from wooden frame. There are wires in between which are filled with beads. This wooden calculator has been used by most of the merchants and offices for quite some time for normal and easy calculations. However, the functions are quite limited and only suitable for basic calculations.

As the economy and technology becoming more and more advance, inventors had come out with basic calculator for people to perform exact calculation. Some of the functions such as 'plus', 'minus', 'multiply' and 'divide' were then developed. After that, programmable calculators are invented to perform complicated calculations easily. The latest calculator is called scientific calculator. It has been widely used in universities and companies to ease the calculation processes. Looking at the convenience of scientific calculator, Rolf Howarth came out with the idea to develop online scientific calculator in 1996. Square Box Systems Ltd. became the host companies to support this online site since the launching of the software.

The written online scientific calculator has all the functions such as logarithms, logs to base 2, square root, factorials, trigonometry functions, hexagonal, binary functions and others. Now, let us look into the benefits of this calculator; be it for business use or personal use.

1) Convenience

It is now convenient for people to perform complicated calculations using online scientific calculator. Today, Wi-Fi is available everywhere and as long as you are connected to the Internet, the calculator can be used anytime you prefer.

2) Easy

This online calculator is easy to be used. There is a manual or help function to guide you if you are not sure which buttons to click for your calculations.

3) User friendly Interface

It is not complicated and it has a user friendly interface. All the buttons are well arranged exactly like the normal scientific calculator.

4) All Types of Calculations

This calculator is able to perform any types of calculations. For example, you can use it to calculate your house loans, property taxes, income tax benefits, insurance and many more. It is suitable for business people as well as students.

The Advantages of Online Scientific Calculator

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HP HP48GX RPN Expandable Graphic Calculator

!±8± HP HP48GX RPN Expandable Graphic Calculator

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HP HP48GX RPN Expandable Graphic Calculator

Item Name: HP 48GX (128KB) graphing calculator - used. Cosmetic Condition: Good Perfect Working ConditionHP 48GX Expandable RPN Graphing Calculator with two expansion card slots This item has been discontinued by the manufacturer. We have a limited number of used calculators available at the price listed on this page; once they are gone we'll likely stop carrying this model. These used units have been verified by us to be in good condition and in working order. Includes cable and batteries. Does not include: Manuals or manufacturer warranty. Returns will not be accepted for this item, but we will repair or replace defective units for an extended period of 60 days.

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Exponential (Scientific) Notation

!±8± Exponential (Scientific) Notation

Practice writing numbers in Exponential Notation.

Exponential (Scientific) Notation

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Exponents & Scientific Notation - Finding the Population of a City

!±8± Exponents & Scientific Notation - Finding the Population of a City

Finding the population of a city may seem like a daunting task. However, it's a lot simpler that you would think. Use exponents and exponential functions to express large or small numbers written in the scientific notatiion. Using the exponential function f (t) = ab^t you can find the population of any city.

Exponents & Scientific Notation - Finding the Population of a City

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Entering accurate characters on your calculator

!±8± Entering accurate characters on your calculator

Entering accurate characters on your calculator

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The Linear Function

!±8± The Linear Function

There are many basic functions you will have to learn over the course of your math career. The first and most basic function is the linear function. A linear function is used to describe the relation of a straight line. This can be any straight line, at any angle or in any position. The general form of these functions is as follows;

y = m*x + b

Lets take a look at what all of these terms mean. It will be important to have a thorough understand of what each of them means in a mathematical and graphical sense.

First off we can establish our two variables in this equation x and y. X is the independent variable and it is denoted on the horizontal axis of a graph. Y is the dependent variable (since its value depends on the value of x) and is denoted on the vertical axis of the graph.

The letter 'm' is the slope of the line. Graphically this will give you the angle of the line. The higher the slope, the steeper the angle with the x axis. The slope can be determined from any two point on the line. You must simply sub their values into the following equation;

m = y2 - y1 / (x2 - x1)

This calculation is usually pretty easy and can be done on your calculator.

The last term, b, is the y intercept of the line. This is the point where the line crosses the y axis. If you have a graph of the line you can simply read this value directly from the graph. If you have the slope of the line, you can sub in any point on the line, rearrange, and solve algebraically for the y intercept.

So as you can see the linear function is not extremely complicated. It is a good place to start when learning about functions.

The Linear Function

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Scientific Notation

!±8± Scientific Notation

If something costs the government 100 billion dollars, How much will it cost you?

Scientific Notation

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HP 32Sii Scientific Calculator

!±8±HP 32Sii Scientific Calculator

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HP 32S II 32SII RPN Scientific Calculator

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Mr. v teaching algebraic - Order of Operation 6c Calculators and accurate notation

!±8± Mr. v teaching algebraic - Order of Operation 6c Calculators and accurate notation

Mr. v teaching algebraic - Order of Operation 6c Calculators and accurate notation

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What Neuroplasticity Really Means

!±8± What Neuroplasticity Really Means

Neuroplasticity is a scientific term that refers to the plasticity of the human brain. Other terms you will hear that mean the same thing are cortical re-mapping and cortical plasticity. And though this term is largely scientific, its underlying mechanisms are much less complicated than the term implies.

When it comes to neuroplasticity, this term refers to functions that occur within the brain in order to enhance the overall productivity of the brain and its functions. Neuroplasticity then specifically refers to how neurons, the name given specifically to brain cells, how they change and are organized within the brain's system.

The cells in the brain known as neurons are arranged in a manner whereby they are all interconnected, and learning within the brain occurs when these interconnections are strengthened through changes. Plasticity is the term that refers to the strengthening of learning at the levels of connections, not at the cellular level. So in other words, when more connections are shared between neurons, or new neurons are added to existing connections, neuroplasticity will occur.

For many years, outside of the loss of neurons through brain damage or excessive toxins such as drug or alcohol use, it had been believed that our brain was incapable of changing. That it was a fixed entity that could not grow or strengthen with time, outside of the natural course of growth and development. No longer is this believed to be the case, with neuroplasticity research showing that the brain is in fact a "plastic" entity if you will, that is capable of changing and growing when met with the right variables.

It is now believed that environmental changes can alter an individuals' cognition and behavior. Cognition refers to the notion of thought processes and thought systems. So if we now know that environmental elements can change, or mould the plasticity of the brain, we can use this as an effective tool in the treatment of psychological disorders and dysfunctions. This is particularly interesting when it comes to disorders and dysfunctions that are caused by faulty thought processes, because if the brain is plastic enough to strengthen and grown through external changes, then we can use neuroplasticity to mould an individual's thought processes and change or alter any psychological impairment they may be suffering from as a result.

What Neuroplasticity Really Means

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Adding Algebraic Fractions With Different Denominators

!±8± Adding Algebraic Fractions With Different Denominators

In this lecture you will learn how to add three algebraic fractions with different denominators.

The 'one-line' mathematical expression syntax that we have to use here is a little cumbersome, so if you want it converted to a pretty-looking 'text book' notation, you can do so by using the conversion tool available on this algebra resources page.

We will solve the following problem:

2/(x-2)-3/(x+2)+1/(x^2-4)

As you can see, there are three fractions here. You can also see that the denominators are all different (duuh!). The first step in adding fractions with different denominators consists of finding the Least Common Denominator (LCD). In order to be able to do that, we must have all denominators factored. There is nothing to factor in the first two, so that leaves the third one:

2/(x-2)-3/(x+2)+1/((x-2)*(x+2))

We have employed the 'difference of two squares' formula:

a^2-b^2 = (a-b)*(a+b).

In this problem "a" was equal to "x" and "b" was equal to "2" (because 2 squared equals 4).

Now it should be pretty obvious what the LCD is - it has to contain all the factors found in all denominators - and that would be this expression: (x-2)*(x+2).

Once we know the least common denominator, we create the numerator in the following way:

- divide LCD with each fraction's denominator and multiply the result with the corresponding numerator. Add all these terms and voila, here is your new numerator:

((x+2)*2+(x-2)*(-3)+1)/((x-2)*(x+2))

The rest of the process is easy - we just need to simplify the resulting numerator. First we multiply out these two terms: 2(x+2) and (-3)(x-2); don't forget the '-' sign in front of number 3!

((2*x+2*2)+(-3*x-3*(-2))+1)/((x-2)*(x+2))

Then we get rid of the parentheses:

(2*x+4-3*x+6+1)/((x-2)*(x+2))

And finally add the like terms:

(-x+11)/((x-2)*(x+2))

At this point we are done (keep in mind that in some more complex problems, you will need to factor the new numerator and try to reduce it with the denominator). We leave the denominator factored, as that form is usually considered simpler.

So, how hard was this ?

A few more lessons, and you will be on your way to better algebra grades...

Adding Algebraic Fractions With Different Denominators

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Ti-83 Graphing Calculator - Why So Popular?

!±8± Ti-83 Graphing Calculator - Why So Popular?

Texas Instrument has designed a calculator that dominates the educational community. Highly rated on its ease of use, the Ti-83 Plus allows students to graph, compare functions, and perform data plotting and analysis. All high school taking pre - algebra, algebra 1 and 2, trigonometry, statistics, biology, physics, business and finance classes all require a graphing calculator. Important standardized testing also requires the Ti-83 Plus; including SAT, PSAT, AP, ACT and Praxis. Additionally, this calculator has abilities of sequential graphing, function, polar and parametric. It is plain and simple, if you are a high school student the Ti-83 Plus is right for you.

The Ti-83 Plus is the Texas Instrument 1999 upgrade from the Ti-83. The greatest improvement to this calculator is Flash ROM. There are two kinds of memory in a graphing calculator; they are ROM (Read Only Memory) and RAM (Random Access Memory). ROM is memory that cannot be changed, RAM which allows you to change the memory, if the graphing calculator loses power, RAM might be lost. With Flash ROM, you can install applications and user files to your calculator. Organizers, day planners, editing spreadsheets and multi-user functions are some of the applications that can be down loaded to the Ti83 Plus. Flash ROM also allows for O.S. (Operating Systems) upgrades allowing your calculator to remain up-to-date and functioning at the highest quality.

The Ti-83 Plus comes with many preloaded applications to aid your calculations. Each application is designed to make it easier for students to learn and succeed. The following are complimentary pre-loaded Ti-83 Plus applications: Probability Simulation Application (used for testing ratios), Study Guide Application (used to make electronic flash cards), Science Tool Application (used to unit conversion) and Vernier Easy/Data (used to make data collection faster and simpler).

While the Ti-83 Plus is primarily an educational tool, now it can be used for entertainment as well! The Ti-83 Plus allows users to download games, both educational and recreational. There is no better way to get a student excited about their calculator than to add an element of fun. The Ti-83 Plus has a great selection of categories to choose from: arcade games, board games, casino games, educational games, and sports games - to name a few. Frogger, Black Jack, Chess, Game Ball, Arithmetica, and Baseball are just a sample of the popular games you can add to your Ti-83 PLUS.

Though it is easy to see why this is the most popular graphing calculator, there is still more! The Ti-83 Plus has all the features to be used as a scientific calculator, allowing middle-school/junior high school students can use this too. Even better, the Ti-83 Plus is the popular graphing calculator in college courses including: mathematics, statistics, biology, physics, business and finance classes. That is 10 years of school, covered with one Ti-83 Plus! With the Ti-83 Plus, you can accomplish all of your calculating needs and you are sure to get your money worth.

Ti-83 Graphing Calculator - Why So Popular?

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Teachers - Formative Assessment - Informal Assessment of Students' Content Knowledge in Mathematics

!±8± Teachers - Formative Assessment - Informal Assessment of Students' Content Knowledge in Mathematics

Although there is overlap between some types of formative assessment and summative, and while there are both informal and formal means of having to assess students in this article I will first provide suggestions for informal, formative assessment for teaching mathematics, especially in today's first of the three categories of Clarke & Wilson

The student of mathematical content knowledge. The mathematical methods for students, such as thinking,Communication, problem solving, and connections. The mathematical assessment of students, such as attitude, perseverance, trust and cooperative skills.

If you want to disagree with the idea that words are labels for concepts, then you are on 1, 2, 3, 4, 5 idea to use the following:

Give your knowledge of each word by writing a 1, 2, 3, 4 or 5 before the word. The numbers indicate the following five statements:

I've never seen the word / term. Iseen the word / phrase, but I do not know what that means. I know this word / concept has something to do with ... I think I know what it means in mathematics I know this word / phrase in one or more of its meanings, including the importance of mathematics.
------------ Unit 2: The activities and the equations -------------

continuous Contrasts Line Length of a segment Beam Central angle of a circle complementary angles Vertical angle triangle Solution of aEquation rational number perfect square discreet scientific notation Endpoint Center Angle right angle Supplementary angles acute-angled triangle Equation equivalent equations irrational perfect cube Absolute value Segment congruent segments Vertex of an angle right angle congruent angles obtuse triangle Solution Square root real number Cube root

I prefer this to be as informal pre-application andpost-evaluation. At the beginning of a new unit or a chapter (and again at the end), I give the students a sheet similar to that of the shows listed above in terms of vocabulary for the unit. [The first time this idea, you must pass through five different levels of understanding speech, but students can easily understand the idea that words have never heard words they know in many ways (and everything in between these two) ]. It 'important to talkwords as she and the students to rate their level of knowledge of word reading, because word recognition, students, when he hears it, but do not realize when they see it. Then, to assess knowledge of content, all the words that students classified as 4 or 5, ask them to do their best to understand what the word means writing in mathematics. This should not be used for a class, but as a formative assessment to give an idea of ​​the students' understanding of conceptsbefore and after the unit of instruction.

A second way of assessing students' content knowledge, is giving students a sheet with 5 rows and 4 columns at the beginning of the week. Then, each day, either as students enter class, or as the closing activity for the day, four problems from a previous day's lesson or homework are given, and students enter each problem (and solution) in the four spaces for the day. The teacher can check these quickly or have a row grader check them. These may be collected each day or at the end of the week, depending on the teacher's plan for using the assessment information.

The third suggestion for formative assessment of content knowledge is performance assessment.  Entire articles (and books) have been written on the next suggestion for formative assessment of mathematical content knowledge, but even though I cannot fully explain it in the context of this article, I would be remiss not to mention the idea of performance assessment. Performance assessments are assessments "in which students demonstrate in a variety of ways their understanding of a topic or topics. These assessments are judged on predetermined criteria" (ASCD, 1996, p. 59).  Baron (1990a, 1990b, and 1991) in Marzano & Kendall (1996) identifies a number of characteristics of performance tasks, including the following:

are grounded in real-world contexts involve sustained work and often take several days of combined in-class and out-of-class time deal with big ideas and major concepts within a discipline present non-routine, open-ended, and loosely structured problems that require students both to define the problem and to construct a strategy for solving it require students to determine what data are needed, collect the data, report and portray them, and analyze them to discuss sources of error necessitate that students use a variety of skills for acquiring information and for communicating their strategies, data, and conclusions (p. 93)

Begin exploring various formative assessment tools with your students to determine their content knowledge in mathematics.  You will learn a great deal - and then be able to help your students learn even more!

Teachers - Formative Assessment - Informal Assessment of Students' Content Knowledge in Mathematics

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