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2. Number Sense (UIL) - Wikipedia

   en.wikipedia.org/wiki/Number_Sense_(UIL)

   Since Number Sense is designed to test students' mental math abilities, no calculators or scratch paper can be used during competition. In order for a question to be scored as correct the exact answer must be given (no allowance for rounding), except where the question is preceded by an asterisk, in which case for the question to be scored as ...

3. Rounding - Wikipedia

   en.wikipedia.org/wiki/Rounding

   As a general rule, rounding is idempotent; [2] i.e., once a number has been rounded, rounding it again to the same precision will not change its value. Rounding functions are also monotonic; i.e., rounding two numbers to the same absolute precision will not exchange their order (but may give the same value).

4. Number sense - Wikipedia

   en.wikipedia.org/wiki/Number_sense

   An active area of research is to create and test teaching strategies to develop children's number sense. Number sense also refers to the contest hosted by the University Interscholastic League. This contest is a ten-minute test where contestants solve math problems mentally—no calculators, scratch-work, or mark-outs are allowed. [8]

5. Principles and Standards for School Mathematics - Wikipedia

   en.wikipedia.org/wiki/Principles_and_Standards...

   The Principles and Standards for School Mathematics was developed by the NCTM. The NCTM's stated intent was to improve mathematics education. The contents were based on surveys of existing curriculum materials, curricula and policies from many countries, educational research publications, and government agencies such as the U.S. National Science Foundation. [3]

6. Elementary mathematics - Wikipedia

   en.wikipedia.org/wiki/Elementary_mathematics

   The slope of a line is a number that describes both the direction and the steepness of the line. [11] Slope is often denoted by the letter m. [12] Trigonometry is a branch of mathematics that studies relationships involving lengths and angles of triangles. The field emerged during the 3rd century BC from applications of geometry to astronomical ...

7. Interval arithmetic - Wikipedia

   en.wikipedia.org/wiki/Interval_arithmetic

   The main objective of interval arithmetic is to provide a simple way of calculating upper and lower bounds of a function's range in one or more variables. These endpoints are not necessarily the true supremum or infimum of a range since the precise calculation of those values can be difficult or impossible; the bounds only need to contain the function's range as a subset.