A 10-key adding machine is a mechanical calculator used in companies and stores before there were electronic calculators. This machine can perform simple calculations, such as addition and subtraction of numbers. The ear... More »

Some online stores like Wal-Mart, SchoolMart and School Outfitters have calculators that do math fractions. Wal-Mart sells the Casio FX-65 fraction calculator that is suitable for elementary and junior high school studen... More »

www.reference.com Math Math Calculators

Mercer University and Calculate My Grade offer good calculators for averaging final course grades. These grade calculators take into consideration the weight given to assignments, such as tests, quizzes and homework, and... More »

www.reference.com Math Math Calculators

Simple-to-use number-pattern calculators for data sets such as arithmetic sequences and geometric sequences can be found on Calculator.net. In these calculators and similar tools, a missing value of a number sequence is ... More »

Meta-Calculator and Alcula offer advanced calculators online. Meta-Calculator provides users access to graphing, scientific, matrix and statistics calculators. Alcula, however, provides one scientific calculator that sup... More »

www.reference.com Math Math Calculators

Greatest common factor online calculators are available at CalculatorSoup.com, MathsIsFun.com and RapidTables.com, as of 2015. Additional sources for GCF and GCD calculators include MathWarehouse.com and WebMath.com. More »

www.reference.com Math Math Calculators

You can download calculators at Download.CNET.com or at Softonic.com. Both of CNET and Softonic offer a wide variety of calculators, including how they were rated by users and the site itself. More »

www.reference.com Math Math Calculators