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  2. Data compression ratio - Wikipedia

    en.wikipedia.org/wiki/Data_compression_ratio

    Thus, a representation that compresses the storage size of a file from 10 MB to 2 MB yields a space saving of 1 - 2/10 = 0.8, often notated as a percentage, 80%. For signals of indefinite size, such as streaming audio and video, the compression ratio is defined in terms of uncompressed and compressed data rates instead of data sizes:

  3. 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.

  4. Arithmetic - Wikipedia

    en.wikipedia.org/wiki/Arithmetic

    For example, the operation of reduction is used to transform the compound quantity 1 h 90 min into the single unit quantity 150 min. [143] Non-Diophantine arithmetics are arithmetic systems that violate traditional arithmetic intuitions and include equations like 1 + 1 = 1 {\displaystyle 1+1=1} and 2 + 2 = 5 {\displaystyle 2+2=5} . [ 144 ]

  5. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    In the United States, many math educators and boards of education have enthusiastically endorsed the National Council of Teachers of Mathematics (NCTM) standards and actively promoted the use of classroom calculators from kindergarten through high school. Calculators may in some circumstances be used within school and college examinations. In ...

  6. Dyscalculia - Wikipedia

    en.wikipedia.org/wiki/Dyscalculia

    As with one-to-one interventions, several digital interventions have also proven successful in children with generalized math learning difficulties. Räsänen and colleagues have found that games such as The Number Race and Graphogame-math can improve performance on number comparison tasks in children with generalized math learning difficulties.

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