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engage students with core math concepts by relating them to high-interest cross-curricular and real-world subjects, like current events, science, and everyday experiences. in every issue build math proficiency and prepare students for standardized tests. Throughout the year we cover all of the grades 6–9 standards, including basic operations, fractions, decimals, measurement, and geometry. Learn more.
Math can be terrifying for many people. This list will hopefully improve your general knowledge of mathematical tricks and your speed when you need to do math in your head. 1.
Relplot constructs high-resolution PostScript or PDF plots of the solutions to equations on two variables. Unlike most other plotters, it can handle general equations and inequations, not just functions, and it can plot multiple equations at once. What can you plot? Multiple equations/formulas separated by commas: , Logical operators for combining formulas: && & || Relational operators: = < <= > >= Binary arithmetic ops: + * - / ^ mod Unary arithmetic ops: | x | sqrt floor exp ln sin cos tan asin acos atan atan2 sinh cosh tanh Built-in variables: x y r th Constants: pi e 2 -.5 1.4e5 .7e01 π User-defined function applications: f ( e 1 ,..., e n ) User-defined variables: a-z x^3 + y^3 = 3xy, r^2 = 9/2
If an enormously heavy object has to be moved from one spot to another, it may not be practical to move it on wheels. Instead the object is placed on a flat platform that in turn rests on cylindrical rollers (Figure 1) . As the platform is pushed forward, the rollers left behind are picked up and put down in front. An object moved this way over a flat horizontal surface does not bob up and down as it rolls along. The reason is that cylindrical rollers have a circular cross section, and a circle is closed curve "with constant width." What does that mean?
To insert an equation using t he keyboard, press ALT+=, and then type the equation. You can insert equation symbols outside a math region by using Math AutoCorrect. For more information, see Use Math AutoCorrect rules outside of math regions check box . In this article Type equations in linear format You can type most equations quickly by using Math AutoCorrect codes.
What's Special About This Number? If you know a distinctive fact about a number not listed here, please e-mail me. primes graphs digits sums of powers bases
Ask someone to name any digit, and you will make a magic square for that digit, so 'every' sum in the square gives you that digit. The square will be 4 X 4. There are ways to do it bigger, but I will leave these to find yourself. :) What you have to remember (or have somewhere secretly written) to show this trick is the following: What are the plus signs for? Read on...
Solving a linear equation system of up to 20 unknowns. If you need some help please scroll down to the example. If not, fill the 2 boxes below , then click on the "Go" button. Example As an example, let's say you have the following 3 equations to solve for the unknowns x , y , and z : 2x + 3y + 1/3z = 10 3x + 4y + 1z = 17 2y + 7z = 46