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The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz around 16 and completed in 1694. The name comes from the translation of the German term for its operating mechanism, Staffelwalze, meaning "stepped drum".
Symbolab is an answer engine that provides step-by-step solutions to mathematical problems in a range of subjects. It was originally developed by Israeli start-up company EqsQuest Ltd., under whom it was released for public use in 2011.
The Little Professor is a backwards-functioning calculator designed for children ages 5 to 9. Instead of providing the answer to a mathematical expression entered by the user, it generates unsolved expressions and prompts the user for the answer.
The ASEBA exists for multiple age groups, including preschool-aged children, school-aged children, adults, and older adults. Scores for individuals in each age group are norm-referenced. The ASEBA has been translated in one hundred languages, and has a variety of multicultural applications.
In the ancient world, abacuses were a practical calculating tool. Although calculators and computers are commonly used today instead of abacuses, abacuses remain in everyday use in some countries.
Pascal's calculator (also known as the arithmetic machine or Pascaline) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen.
Scott's course provides a step-by-step guide to becoming 'A Human Calculator.' Scott created this course to help people master mental mathematics. The training covers the unknown and hidden patterns behind numbers and how they work in our daily life.
Decades on a logarithmic scale, rather than unit steps (steps of 1) or other linear scale, are commonly used on the horizontal axis when representing the frequency response of electronic circuits in graphical form, such as in Bode plots, since depicting large frequency ranges on a linear scale is often not practical.
A stepfamily is a family where at least one parent has children who are not biologically related to their spouse. Either parent, or both, may have children from previous relationships or marriages.
Family law. Child support (or child maintenance) is an ongoing, periodic payment made by a parent for the financial benefit of a child (or parent, caregiver, guardian) following the end of a marriage or other similar relationship.