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2. Mental abacus - Wikipedia

   en.wikipedia.org/wiki/Mental_abacus

   The abacus system of mental calculation is a system where users mentally visualize an abacus to carry out arithmetical calculations. [1] No physical abacus is used; only the answers are written down. Calculations can be made at great speed in this way.

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. Trachtenberg system - Wikipedia

   en.wikipedia.org/wiki/Trachtenberg_system

   Mental abacus – As students become used to manipulating the abacus with their fingers, they are typically asked to do calculation by visualizing abacus in their head. Almost all proficient abacus users are adept at doing arithmetic mentally. [citation needed] Chisanbop

5. 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.

6. Feds find Worcester, Massachusetts police used force, had ...

   www.aol.com/feds-worcester-massachusetts-police...

   WORCESTER, Mass. – Local police in this central Massachusetts city used excessive force and engaged in “outrageous” sexual contact with women during undercover operations, a two-year civil ...

7. Envoy Hochstein says US working with Lebanon and Israel to ...

   www.aol.com/news/envoy-hochstein-says-us-working...

   BEIRUT (Reuters) -U.S. special envoy Amos Hochstein said on Monday in Beirut that the United States was working on a formula to end the conflict between Israel and Lebanese armed group Hezbollah ...