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2. Number Sense (UIL) - Wikipedia

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

   Number Sense is designed to test students' mental math abilities (i.e., ... Students in Grade 4 through Grade 12 are eligible to enter this event. For competition ...

3. Mathnasium - Wikipedia

   en.wikipedia.org/wiki/Mathnasium

   A Mathnasium location in Franconia, Virginia. Mathnasium (also Mathnasium Learning Center) is an American education brand and supplemental math learning franchise consisting of over 1,000 learning centers in North America, South America, Europe, the Middle East, and Asia that provides instruction to students in pre-kindergarten through high school. [1]

4. Chisanbop - Wikipedia

   en.wikipedia.org/wiki/Chisanbop

   The Chisanbop system. When a finger is touching the table, it contributes its corresponding number to a total. Chisanbop or chisenbop (from Korean chi (ji) finger + sanpŏp (sanbeop) calculation [1] 지산법/指算法), sometimes called Fingermath, [2] is a finger counting method used to perform basic mathematical operations.

5. Mental calculation - Wikipedia

   en.wikipedia.org/wiki/Mental_calculation

   It has been shown that during high levels of physical activity there is a negative effect on mental task performance. [5] This means that too much physical work can decrease accuracy and output of mental math calculations. Physiological measures, specifically EEG, have been shown to be useful in indicating mental workload. [6]

6. Trachtenberg system - Wikipedia

   en.wikipedia.org/wiki/Trachtenberg_system

   Take half of the neighbor, then, if the current digit is odd, add 5. Example: 42×5=210 Half of 2's neighbor, the trailing zero, is 0. Half of 4's neighbor is 1. Half of the leading zero's neighbor is 2. 43×5 = 215 Half of 3's neighbor is 0, plus 5 because 3 is odd, is 5. Half of 4's neighbor is 1. Half of the leading zero's neighbor is 2. 93 ...

7. 'Gate lice' and 'seat squatters' among 2024's most viral ...

   www.aol.com/gate-lice-seat-squatters-among...

   As the year of 2024 wraps up, here's a list of travel trends in America that consumed folks on social media, including "gate lice," "seat squatters" and "sleep divorce."