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To calculate the value of an apple and an orange from 2 purchases.About mental arithmetic, with a pre-algebra tool...
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To calculate the value of an apple and an orange from 2 purchases.About mental arithmetic, with a pre-algebra tool introducing the Gaussian elimination.In the mirror site, there's the Android 2.2 (and up) version of this program.
Material Type:
Simulation
Author:
Maurici Carbó
Date Added:
Aug 27, 2012
Date Modified:
Sep 18, 2012
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To calculate the value o apple, orange, pear and lemon from 4 purchases.About mental arithmetic, with a pre-algebra tool...
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To calculate the value o apple, orange, pear and lemon from 4 purchases.About mental arithmetic, with a pre-algebra tool introducing the Gaussian elimination.
Material Type:
Simulation
Author:
Maurici Carbó
Date Added:
Aug 31, 2012
Date Modified:
Aug 31, 2012
Peer Review for material titled "Adding apples oranges pears and lemons"
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This application is a basic tool for teaching algebra.Trying to solve a system of linear equations with two equations and two...
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This application is a basic tool for teaching algebra.Trying to solve a system of linear equations with two equations and two unknown variables. (Two purchases)It contains:. A button that generates new questions (״two new purchases of fruits״).. Two drop-downs to select a solution and a button to verify: The verification button checks the solution, and adds it to the list of the session.You can edit the statements. The program checks if the determinant of the proposed statement is nonzero.. The 5 tools to help resolve the problem:* Tool 1: Gauss-Jordan elimination:The two equations are represented as two purchases of fruits.Contains tools to add one column to another, multiply, divide and change the sign for to get to have one apple on a side and and an orange at the other.The result of the two additions are the values of apple and orange.* Tool 2: Graphic:Contains a graphic frame and 2 drop-downs to find the solution, using the method essay / error.The problem posed is a linear system of equations, so the results must be ever into two lines that intersect.To get the answer, one should find this point.You can also click directly on the chart.The graph is divided by the diagonal.Below the diagonal, apple values are entered, for to get the values of the orange.Above the diagonal, one enters the price of the orange.The meeting point of the two lines is represented by a yellow dot.* Tool 3: Two weighing scales:Shows two weighing balances. On the left, due to its drop-down, which determines the value proposed for apples: results gives the price of oranges in terms of the two equations.The right hand scale gives the results from the proposed price for oranges.When a scale is balanced, gives the results of both the price of the apples and oranges.* Tool 4: Cramer's Rule:This tool solves the problem at once.Contrary to what happens in other tools, here we have to manually enter the data of the problem. The two equations (two purchases) are represented in horizontal rows.If you have not entered data, the tool warns that you can not solve the problem.It can also warn when the determinant is zero:The determinant is zero when the two lines that we saw in the graphical tool, are not crossing. This happens when they are parallel. And the lines are parallel when a purchase (equation) is linear function of the other. (eg 1 A + 2 O =n1 and 2 A + 4 O = n2)The program automatically never generates such problems.* Tool 5: Inverse matrix:The tool represents the terms of the equation automatically and in landscape format (each purchase is a row)The resolution tool there are the terms of the two equations on the left and the identity matrix at right.The objective is to calculate the inverse matrix.This is achieved by operating the rows, until the data from the equations (on the left) become the identity matrix.At this time to the right we have the inverse matrix.The multiplication of the results vector by the inverse matrix gives the solution.This app costs $1.25
Material Type:
Simulation
Author:
Maurici Carbó
Date Added:
Sep 27, 2013
Date Modified:
Mar 18, 2014
Peer Review for material titled "Apples And Oranges 1 Decimal App for Android"
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Application on addition of fractions.Working with italian pizzas, improper fractions and mixed fractions.The program raises...
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Application on addition of fractions.Working with italian pizzas, improper fractions and mixed fractions.The program raises the problem from a hypothetical party where the guests ask for a specific pizza fraction. Guests can only choose two types of pizza for each party.The program calls for the total amount you end up ordering pizza.In order to solve the most difficult problems is a tool to help solve, finding the common denominator.There is a video as support material: http://youtu.be/TVTzNwDPmLU(Video soundtrack: 'O surdato nnammurato' (written by: Aniello Califano Composer: Enrico Cannio) Voice by: Beniamino Gigli) (In Neapolitan language)This program has a castilian (spanish) version and catalan version in the nummolt site:״Cuanta pizza encargamos?״ & "Quanta pizza encarreguem?״There's a free Android (V2.2 and up) version in the mirror link: (multilingual version: en, ca, es, fr, it)https://play.google.com/store/apps/details?id=nummolt.howmuch.pizza
Material Type:
Simulation
Author:
Maurici Carbó
Date Added:
Nov 11, 2012
Date Modified:
Jan 14, 2013
Peer Review for material titled "How much pizza to order?"
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Math Water Table is an online liquid simulator. (Former obbliq)To get the area of a limited number of shapes (rectangles and...
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Math Water Table is an online liquid simulator. (Former obbliq)To get the area of a limited number of shapes (rectangles and triangles)To verify the area formulas of some limited geometrical shapes.Video help at: http://www.youtube.com/watch?v=ngqFCrkoCAUMWT Ideas: http://www.youtube.com/playlist?list=PLo4AMY8jDHYYPu5WBubdyLqYw5yItT3FeIs useful to explain multiplication and division. The old program is in the mirror link.
Material Type:
Simulation
Author:
Maurici Carbó
Date Added:
Jan 04, 2003
Date Modified:
Feb 27, 2013
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Interactive applet to visualize numbers: Write a simple operation (addition, subtraction or multiplication) and solve in a...
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Interactive applet to visualize numbers: Write a simple operation (addition, subtraction or multiplication) and solve in a interactive way.Nubers are visualized like polygonal shapes (in Z), modular shapes (in Z), or base 10 blocks (N).To visualize numbers in a particle analogy. This work is the internet version of the old nummolt program (15 years after)Video help available. (link in the applet)
Material Type:
Simulation
Author:
Maurici Carbó
Date Added:
Apr 28, 2012
Date Modified:
May 22, 2012
Peer Review for material titled "Nummolt modulo applet"
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Integers are transformed into small blocks. Math manipulative. Particle analogy. Positive and negative particles, to explain...
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Integers are transformed into small blocks. Math manipulative. Particle analogy. Positive and negative particles, to explain addition, subtraction and multiplication.
Material Type:
Simulation
Author:
Maurici Carbó
Date Added:
Dec 01, 2001
Date Modified:
Apr 05, 2013
Peer Review for material titled "nummòlt"
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