你可能知道数学和科学问题的所有公式,但是如果你不知道如何使用你的科学计算器,你将永远得不到正确的答案。下面快速回顾一下如何识别科学计算器、这些键的含义以及如何正确输入数据。首先,你需要知道科学计算器与其他计算器有什么不同。有三种主要类型的计算器:基本的、商业的和科学的。你不能在基本或商业计算器上处理化学、物理、工程或三角问题,因为它们没有你需要使用的函数。科学计算器包括指数、日志、自然日志(ln)、触发函数和内存。当你使用科学符号或者任何具有几何分量的公式时,这些函数是至关重要的。基本计算器可以做加法、减法、乘法和除法。商业计算器包括利率按钮。它们通常忽略操作的顺序。学习使用计算器的明显方法是阅读手册。如果你有一个没有手册的计算器,你通常可以在线搜索模型并下载一个副本。否则,您需要做一些试验,否则您将输入正确的数字,但仍然得到错误的答案。发生这种情况的原因是不同的计算器处理操作顺序不同。例如,如果你的计算是:3 + 5×4。你知道,根据运算的顺序,5和4应该在加上3之前相乘。你的计算器可能知道或可能不知道这一点。如果你按3+5×4,一些计算器会给你32个答案,而其他计算器会给你23个(这是正确的)。找出你的计算器是做什么的。如果看到操作顺序有问题,可以输入5×4+3(以避开乘法)或使用括号3+(5×4)。按下哪个键,什么时候按以下是一些示例计算以及如何确定输入它们的正确方式。无论何时借用别人的计算器,都要养成执行这些简单测试的习惯,以确保正确地使用它。Square RootFind是4的平方根。你知道答案是2(对吗?)在计算器上,找出是否需要输入4,然后按SQRT键,还是按SQRT键然后输入4。键可以标记为XY或YX。你需要找出你输入的第一个数字是x还是y。输入2,电源键,3来测试它。如果答案是8,那么你拿了23,但是如果你得到了9,计算器给你32分。再次测试是否按下10x按钮然后输入x,或者输入x值然后按下按钮。这对于科学问题至关重要,你将生活在科学记数法的土地上!当你使用角度时,记住许多计算器允许你选择用度数还是弧度来表达答案。然后,你需要确定你是否输入了角度(检查单位),然后是Sin、COS、TAN等等,或者你按下Sin、CoS等按钮,然后输入数字。你如何测试这个:记住30度角的正弦是0.5。输入30,然后犯罪,看看你是否得到0.5。不?试试罪,然后30。如果你使用这些方法中的0.5种,那么你知道哪种方法有效。但是,如果你得到-0.988,那么你的计算器被设置为弧度模式。若要更改为度,请查找模式键。通常有一个用数字写的单位指示器,让你知道你得到了什么。

英国杜伦大学统计学Essay代写:科学计算器

You may know all the formulas for mathematical and scientific problems, but if you don’t know how to use your scientific calculator, you will never get the right answer. Here’s a quick review of how to identify scientific calculators, what these keys mean, and how to input data correctly. First, you need to know how scientific calculators differ from other calculators. There are three main types of calculators: basic, commercial and scientific. You can’t deal with chemical, physical, engineering or triangular problems on basic or commercial calculators because they don’t have the functions you need to use. Scientific calculator includes index, log, natural log (ln), trigger function and memory. These functions are crucial when you use scientific symbols or any formula with geometric components. The basic calculator can do addition, subtraction, multiplication and division. Commercial calculators include interest rate buttons. They usually ignore the order of operations. The obvious way to learn how to use a calculator is to read a manual. If you have a calculator without a manual, you can usually search the model online and download a copy. Otherwise, you need to do some experiments, otherwise you will enter the correct number, but still get the wrong answer. The reason for this is that different calculators handle different operations in different order. For example, if your calculation is: 3+5*4. You know, according to the order of operations, 5 and 4 should be multiplied before adding 3. Your calculator may or may not know this. If you press 3+5*4, some calculators will give you 32 answers, while others will give you 23 (which is correct). Find out what your calculator does. If you see a problem with the sequence of operations, you can enter 5 * 4 + 3 (to avoid multiplication) or use parentheses 3 + (5 * 4). Which key to press and when to press. Here are some examples of calculations and how to determine the correct way to input them. Whenever you borrow someone else’s calculator, develop the habit of performing these simple tests to ensure that it is used correctly. Square RootFind is the square root of 4. You know the answer is 2 (right?) On the calculator, find out if you need to enter 4, then press SQRT, or SQRT, and then enter 4. Keys can be marked XY or YX. You need to find out if the first number you enter is x or y. Enter 2, power key, 3 to test it. If the answer is 8, you get 23, but if you get 9, the calculator gives you 32 points. Test again if you press the 10x button and then enter x, or enter the x value and then press the button. This is crucial to scientific problems. You will live on the land of scientific notation! When you use angles, remember that many calculators allow you to choose between degrees or radians. Then you need to make sure that you enter the angle (check unit), then Sin, COS, TAN, etc., or you press the buttons Sin, CoS, etc., and then enter the number. How do you test this: remember that the sine at 30 degrees is 0.5. Enter 30 and then commit a crime to see if you get 0.5. No Try crime, then 30. If you use 0.5 of these methods, you know which one works. However, if you get – 0.988, then your calculator is set to radian mode. To change to degree, look for the mode key. Usually there’s a unit indicator written in numbers to let you know what you’ve got.

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