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2. Counting rods - Wikipedia

   en.wikipedia.org/wiki/Counting_rods

   Counting rods (筭) are small bars, typically 3–14 cm (1" to 6") long, that were used by mathematicians for calculation in ancient East Asia.They are placed either horizontally or vertically to represent any integer or rational number.

3. Soroban - Wikipedia

   en.wikipedia.org/wiki/Soroban

   A suanpan (top) and a soroban (bottom). The two abaci seen here are of standard size and have thirteen rods each. Another variant of soroban. The soroban is composed of an odd number of columns or rods, each having beads: one separate bead having a value of five, called go-dama (五玉, ごだま, "five-bead") and four beads each having a value of one, called ichi-dama (一玉, いちだま ...

4. File:Suanpan and counting rods.svg - Wikipedia

   en.wikipedia.org/wiki/File:Suanpan_and_counting...

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5. Cuisenaire rods - Wikipedia

   en.wikipedia.org/wiki/Cuisenaire_rods

   Cuisenaire rods illustrating the factors of ten A demonstration the first pair of amicable numbers, (220,284). Cuisenaire rods are mathematics learning aids for pupils that provide an interactive, hands-on [1] way to explore mathematics and learn mathematical concepts, such as the four basic arithmetical operations, working with fractions and finding divisors.

6. Suanpan - Wikipedia

   en.wikipedia.org/wiki/Suanpan

   Since each rod represents a digit in a decimal number, the computation capacity of the suanpan is only limited by the number of rods on the suanpan. When a mathematician runs out of rods, another suanpan can be added to the left of the first. In theory, the suanpan can be expanded indefinitely in this way.

7. Fiveable makes first acquisition: A virtual study tool built ...

   www.aol.com/news/fiveable-makes-first...

   Fiveable, an online learning community for high school students, made its first-ever acquisition earlier this week: Hours, a virtual study platform built by a 16-year-old. Fiveable is a free ...

8. File:Counting rod vertical red 3.svg - Wikipedia

   en.wikipedia.org/wiki/File:Counting_rod_vertical...

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9. AOL Mail - AOL Help

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   Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.