Recent Projects in Quick Math

Squaring 2-Digit Numbers

Hope this helps you!

Pie Chart

November 9th, 2009: Chosen by The-Whiz (scratch curator) Thanks The-Whiz! My first One-Sprite One-Script! A simple pie chart creator. The colors are random. Instructions in the project. Have Fun :D

Visual Calculator I

Fractals - A Visual Approach to Arithmetic By DrSuper http://www.galaxy.gmu.edu/~drsuper/art1.html I added the original fractal Numerals for all the digits to nevit's cool project. Thank you nevit for getting me started. It has been a while since I played with these.

One, Two, Three

Fractals - A Visual Approach to Arithmetic inspired by work of DrSuper and Subitising. http://www.galaxy.gmu.edu/~drsuper/art1.html Press Space for a new result.

One_Hundred(Cem)

INSTRUÇÕES - INSTRUCTIONS Segue as instruções do mocho e tenta resolver o problema algebricamente. Depois, introduz o valor de X e clica no botão para confirmar se acertaste. - - - - - - - - - - - - - - Follow the owl instructions and try to solve this problem by algebric means. Afterwards, input the X value and click the button to confirm if you are right. CRÉDITOS - CREDITS Este é um remix de http://scratch.mit.edu/projects/drsuper/676759 para português. Gostaria de agradecer ao DrSuper por me ter encarregado desta tarefa e por tê-la revisto. - - - - - - - - - - - - - - - - This is a remix of http://scratch.mit.edu/projects/drsuper/676759 into Portuguese. I would like to thank DrSuper for having commited me this task and for reviewing it.

Galinhas(Hens)

INSTRUÇÕES Primeiro tenta resolver o problema, depois podes consultar a solução e experimentar diversos valores num gráfico de barras. INSTRUCTIONS First, you try to solve a little puzzle, then you can see the solution and test several values in a graphic of bars. CRÉDITOS - CREDITS Puzzle from http://www.scientificpsychic.com/graphics/ Gostaria de agradecer ao DrSuper pela cuidada revisão dos textos ingleses. (I would like to thank to DrSuper for the careful reviewing of the English texts).

Trigonometry

Right Triangle Trigonometry Move point C and it will calculate angle, side, and area measurements. To see the actual formulas, you can download the project

Factoring Numbers

**UPDATED** Just a little project I made. Factors *only* positive numbers. For, example, 680 is factored to 2,2,2,5,17, because 2 x 2 x 2 x 5 x 17 = 680. (Large prime numbers take a while)

Discovering the Unit Circle

This is the beginnings of an introduction to the Unit Circle. Once students understand how to find the coordinates, it is easy to recognize a pattern for memorizing the Unit Circle. I hope you enjoy it.

Trig Functions

Explore the Sine and Cosine trigonometric functions of a right triangle. As you drag the dots around, the triangle will change and show you the new lengths of it's sides as well as the angle at the RED dot corner. The sine (Sin) and cosine (Cos) of the angle at the RED dot corner are also calculated. Hopefully from this diagram, you can see how the Sin and Cos functions are useful for solving for the length of the sides of a right triangle if you have the Hypotenuse and the angle: Adacent = Hypotenuse * Cosine of Angle Opposite = Hypotenuse * Sine of Angle These functions are very handy to programmers who are trying to calculate the X and Y coordinates of a point positioned at a known angle and distance from another point.

trigonometry

A trigonometry turorial. Use the arrow keys and the sliders to controll the example. View the text first then the example. The example is one sprite :)

worm

The motion of a worm. I used ideas from physics (inspired from a work in MODELLUS). Press the green flag to start.

Lissajous figure

Lissajous figures were a lot of fun when I was a child playing with an oscilloscope. Try adjusting the phase or the frequency of the two oscillators to get different patterns. Use the clear button if things get messed up from changing parameters.

Ultra-Fast Circle

Click anywhere to draw! This project uses the sine and cosine of the circle angle and multiplys it by the radius to plot the points. Each script loop is 20 points and it loops over 9 times. There's a variable in the project that I forgot to remove (Circle Radius), if you download this project just ignore it.

Trig Demo

This is a demonstration for how to calculate trigonometric functions using Scratch. You can also copy the "Point" sprite into your own project "as is" with no other modifications, and use the "Broadcast and wait" block to calculate trig functions whenever you need them in your project. Set the value of "Angle" to the desired angle value in degrees, and the variables "Sine" "Cosine" and "Tangent" will be set fractional values.