Tool:
Touch Natural Numbers 
Screenshot:

Go to: 
http://play.google.com/store/apps/details
(opens a new window)

Description: 
With this app you can:
 analyze the factors of a composite number.
 build a composite number from its factors (multiplication and division of natural numbers).
 localize or select a number in the Ulam Spiral. (Only prime numbers have a color in this spiral).
 verify all the possible products between primes in a composite number with the parabolic sieve.
 analyze or build a number with the place value activity (addition and subtraction of natural numbers).
 understand the modulo of a number.
 know about polygonal numbers and the numbers as the sum of two prime numbers, and as the sum of three prime numbers.

Technology Type: 
Android  
Guide: 
User's Guide
(opens a new window)

Author: 
Maurici Carbó 
Language: 
English  
Cost: 
Does not require payment for use 

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Courses: 
Math 1 
Place value 
 Math 2 
Place value 
 Math 3 
Addition, Subtraction, Multiplication, Division, Whole numbers, Place value, Prime, Composite, Factor, Prime factorization, Divisibility tests, Multiple 
 Math 4 
Addition, Subtraction, Multiplication, Division, Whole numbers, Place value, Prime, Composite, Factor, Prime factorization, Divisibility tests, Multiple 
 Math 5 
Addition, Subtraction, Multiplication, Division, Whole numbers, Properties of numbers, Prime, Composite, Factor, Prime factorization, Divisibility tests, Multiple 
 Math 6 
Addition, Subtraction, Multiplication, Division, Properties of numbers, Exponents, Prime, Composite, Factor, Prime factorization, Divisibility tests, Multiple 
 Math 7 
Properties of numbers, Roots/radicals, Writing square roots, Prime, Composite, Factor, Prime factorization, Multiple 
