The Abacus and the Numeral Frame

The abacus is a computing device on which arithmetic calculations are performed by sliding counters (beads, pebbles, or flat discs) along rods, wires or lines. Learn more

IEEE - The abacus, also called a counting frame, is commonly referred to as the first known calculator and was invented in Babylonia in 2400 BC. It was used primarily in parts

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Construction:this math learing abacus has 10 beads per row and altogether 10 rows,100 beads in total. - Safe material and colorful:this abacus has

MAGIKON Wooden Counting Number Frame, 10 Rows Abacus for Kids Learning Math (11

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The Teaching Abacus or Numeral Frame Smithsonian American Women's History

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Baby Products Online - Educational Abacus for Kids Math - 10 Rows Wooden Counting Frame with Tabs Number 1-100 - Teach Counting, Adding and Subtracting Math Toys, Preschool Learning Toys - Kideno

Construction:this math learing abacus has 10 beads per row and altogether 10 rows,100 beads in total. - Safe material and colorful:this abacus has

MAGIKON Wooden Counting Number Frame, 10 Rows Abacus for Kids Learning Math (11

Abacus RGB color icon. Mathematical tool. Counting frame. Math knowledge and ability. Numeral system. Isolated vector illustration. Simple filled line drawing. Editable stroke. 14025881 Vector Art at Vecteezy