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2. Worksheet - Wikipedia

   en.wikipedia.org/wiki/Worksheet

   The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

3. Mathematics - Wikipedia

   en.wikipedia.org/wiki/Mathematics

   There are many areas of mathematics, which include number theory (the study of numbers), algebra (the study of formulas and related structures), geometry (the study of shapes and spaces that contain them), analysis (the study of continuous changes), and set theory (presently used as a foundation for all mathematics).

4. Saxon math - Wikipedia

   en.wikipedia.org/wiki/Saxon_math

   The Saxon Math 1 to Algebra 1/2 (the equivalent of a Pre-Algebra book) curriculum [3] is designed so that students complete assorted mental math problems, learn a new mathematical concept, practice problems relating to that lesson, and solve a variety of problems. Daily practice problems include relevant questions from the current day's lesson ...

5. Mathematical structure - Wikipedia

   en.wikipedia.org/wiki/Mathematical_structure

   In mathematics, a structure on a set (or on some sets) refers to providing it (or them) with certain additional features (e.g. an operation, relation, metric, or topology). Τhe additional features are attached or related to the set (or to the sets), so as to provide it (or them) with some additional meaning or significance.

6. Algebra - Wikipedia

   en.wikipedia.org/wiki/Algebra

   Algebra is the branch of mathematics that studies certain abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic operations other than the standard arithmetic operations, such as addition and multiplication.

7. Cuba's electric grid collapses after power plant failure ...

   www.aol.com/news/cubas-electric-grid-collapses...

   HAVANA (Reuters) -Cuba's national electrical system collapsed early on Wednesday morning after the country's largest power plant failed, the government said, the latest of several such failures as ...