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Technology 
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Estimador cuatro

Estimation (Math 3) 
Java Applet 
Tool 

[0]

Un juego como Fracción Cuatro, pero el Estimador le pide al jugador que calcule la respuesta dentro de un límite de tiempo dado. Parámetros: límite de tiempo, tolerancia de error, nivel de dificult...
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Estimador de comparaciones

Estimation (Math 3) 
Java Applet 
Tool 

[0]

Similar al Estimador pero compara dos conjuntos de objetos.
versión en inglés
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Estimador de mayor o menor

Estimation (Math 3) 
Java Applet 
Tool 

[0]

Similar a la actividad de Estimador pero da una cantidad y pide al usuario que estime si el grupo de objetos es mayor o menor al número dado.
versión en inglés
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Estimator

Estimation (Math 3) 
Java Applet 
Tool 

[0]

Practice estimation skills by determining the number of objects, length, or area. Parameters include: error tolerance.
Spanish version also available.
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Estimator Four

Estimation (Math 3) 
Java Applet 
Tool 

[0]

A game that asks the players to estimate an answer within a given time span. Parameters include: time limit, error tolerance, difficulty level.
Spanish version also available.
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Five Frame

Addition (Math 3) 
Java Applet 
Tool 

[4]

In this interactive fiveframes tool, users practice counting and adding to ten. The frames help users think of numbers in relation to 5.
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Flash Cards

Addition (Math 3)+ 
Java Applet 
Tool 

[1]

This applet produces random math problems and tracks the number of correct answers that are given.
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Magic Square Java Applet

Operations with numbers (Math 3) 
Java Applet 
Tool 

[0]

Slide each number to fill one of the squares so that the sum of the columns and rows equal the same number. Start with a 3 x 3 square and then try a 4 x 4 and a 5 x 5. Originally written in 1996, you ...
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Math Owl

Operations with numbers (Math 3) 
Java Applet 
Tool 

[0]

Animated chalkboard lessons in adding, subtracting, multiplying, or dividing, from single digit addition to regrouping to multidigit multiplication and division. Follow the prompts that break down e...
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Mental Arithmetic Drills

Mental math (Math 3) 
Java Applet 
Tool 

[2]

Mental arithmetic drills in the four operations. Various difficulty levels are available.
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More or Less Estimator

Estimation (Math 3) 
Java Applet 
Tool 

[1]

States a quantity and asks the user to estimate whether the set of objects is more or less than the number given.
Spanish version also available.
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Number Line Arithmetic

Addition (Math 3)+ 
Java Applet 
Tool 

[1]

This virtual manipulative can be used to depict whole number addition, subtraction, multiplication and division operations carried out on a numberline.
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Number Line Bounce

Addition (Math 3)+ 
Java Applet 
Tool 

[5]

This virtual manipulative can be used to visualize a sequence of operations on a number line and to create number sentences representing the operations.
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Number Puzzles

Operations with numbers (Math 3) 
Java Applet 
Tool 

[1]

Solve puzzles involving arranging numbers on a diagram so that they add up to a given value.
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Rectangle Multiplication

Multiplication (Math 3) 
Java Applet 
Tool 

[2]

Visualize the multiplication of two numbers as an area. Choose the latticeoption to draw a correspondence between the lattice method for multiplying numbers and an area representation. Choose t...
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Soroban in Various Number Syst...

Addition (Math 3)+ 
Java Applet 
Tool 

[0]

An interactive Java gadget simulating sorobanthe Japanese abacus. Options inlude selecting the number system base and the number of wires. The applet displays the number matching the configur...
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Space Math

Addition (Math 3) 
Java Applet 
Tool 

[1]

Space Math is a project designed to assist students to learn about place value and carrying.
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Suan Pan in Various Number Sys...

Addition (Math 3)+ 
Java Applet 
Tool 

[0]

An interactive Java gadget simulating suan panthe Chinese abacus. Options include selecting the number system base and the number of wires. The applet displays the number matching the configu...
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Ten Frame

Addition (Math 3) 
Java Applet 
Tool 

[0]

In this interactive tenframes tool, users practice counting and adding to twenty. The frames help users think of numbers in relation to 10.
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The Abacus in Various Number S...

Addition (Math 3)+ 
Java Applet 
Tool 

[0]

An interactive Java applet showing one or two Russian abacuses with options to select the base of the number system and the number of wires. The applet displays the number matching the current config...
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Weighing Riddles

Multiplication (Math 3)+ 
Java Applet 
Tool 

[0]

Users interact with a balance scale. Some of the weights are labeled in pounds (lbs) and others are labeled with an unknown (?) number of pounds. By putting some weights on both sides of the scale the...
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Addition Worksheets

Addition (Math 3) 
JavaScript 
Tool 

[0]

A script which allows control over generating positive whole number addition problems of various selectable lengths.
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Base 10 Addition Mathlets

Operations with numbers (Math 3)+ 
JavaScript 
Tool 

[0]

The idea for the one, two, and three place addition mathlets is to show the steps in the base ten addition procedure in conjunction with a model. Each time the mathlet is run (by clicking the "New" b...
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Base 10 Subtraction Mathlets

Operations with numbers (Math 3)+ 
JavaScript 
Tool 

[0]

These mathlets illustrate the standard base 10 subtraction algorithm. They provide randomly generated subtraction problems with up to 4 decimal places and allow the student to step through the solutio...
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Cryptarithms

Operations with numbers (Math 3) 
JavaScript 
Tool 

[2]

Cryptarithms are brain teasers obtained when digits in numerical calculations have been replaced by letters. Customarily, distinct letters stand for different digits. Another term, Alphametics, denote...
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