Algebra Basic Calculators
Essential tools for fundamental algebra operations
Basic Arithmetic
Elementary arithmetic
Basic operations: addition, subtraction, multiplication, division
Average
Calculate arithmetic mean of numbers
Factorial
Calculate n! factorial values
Number Theory
All divisors of an integer
Find all factors of a given number
Common divisors of two integers
Find shared factors of two numbers
Greatest common divisor
Calculate GCD using Euclidean algorithm
Least common multiple
Find LCM of two or more numbers
Modulo
Calculate remainder of division
Division with remainder
Euclidean division with quotient and remainder
Algebraic Formulas
Binomial formulas
Expand (a+b)² and (a-b)² expressions
FOIL Method
First, Outer, Inner, Last multiplication
Cross multiplication
Solve proportions using cross products
Inverse cross multiplication
Reverse cross multiplication process
Diamond problem
Find two numbers with given sum and product
Direct variation
Calculate direct proportional relationships
Advanced Operations
Digit sum
Sum of all digits in a number
Digital root
Recursive sum of digits until single digit
Consecutive integers
Find consecutive numbers with given sum
Multiplicative inverse
Find modular multiplicative inverse
Inverse modulo
Calculate modular inverse operations
Chinese remainder theorem
Solve system of modular congruences
Changes & Variations
Absolute Change
Calculate absolute difference between values
Relative Change
Calculate percentage change between values