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  2. Skip counting - Wikipedia

    en.wikipedia.org/wiki/Skip_counting

    Skip counting is a mathematics technique taught as a kind of multiplication in reform mathematics textbooks such as TERC. In older textbooks, this technique is called counting by twos (threes, fours, etc.). In skip counting by twos, a person can count to 10 by only naming every other even number: 2, 4, 6, 8, 10. [1]

  3. 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.

  4. Non-numerical words for quantities - Wikipedia

    en.wikipedia.org/wiki/Non-numerical_words_for...

    Presumably from the practice, in counting sheep or large herds of cattle, of counting orally from one to twenty, and making a score or notch on a stick, before proceeding to count the next twenty. [3] [4] A distance of twenty yards in ancient archery and gunnery. [5] Threescore: 60 Three score (3x20) Large: 1,000 Slang for one thousand Myriad ...

  5. List of prime numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_prime_numbers

    There are known formulae to evaluate the prime-counting function (the number of primes smaller than a given value) faster than computing the primes. This has been used to compute that there are 1,925,320,391,606,803,968,923 primes (roughly 2 × 10 21) smaller than 10 23.

  6. 30 Dogs Wearing Goggles That Might Just Make Your Day, As ...

    www.aol.com/50-most-wholesome-images-dogs...

    Image credits: danngree People just seem to love dogs, and it’s estimated that over 65 million American households own one.It’s not just the fact that they look cute, but these pooches also ...

  7. College Football Playoff rankings: Top four unchanged as ...

    www.aol.com/sports/college-football-playoff...

    There was hardly any movement at the top of the College Football Playoff rankings after Week 13.. The top four teams remained the same as Notre Dame moved up a spot to No. 5. The Fighting Irish ...

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