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Abacus ABACUS (Atomic-orbital Based Ab-initio Computation at USTC) is an open-source software package designed for large-scale electronic structure simulations from first principles
Abacus - Wikipedia Abacus-based mental calculation (AMC), which was derived from the abacus, is the act of performing calculations, including addition, subtraction, multiplication, and division, in the mind by manipulating an imagined abacus
Abacus | Definition, History, Origin, Facts | Britannica Abacus, calculating device, probably of Babylonian origin, that was long important in commerce It is the ancestor of the modern calculating machine and computer The abacus was in universal use in Europe in the Middle Ages, as well as in the Arab world and in Asia
ABACUS中文 (简体)翻译：剑桥词典 - Cambridge Dictionary Machines for calculating fixed numerical tasks such as the abacus have existed since antiquity, aiding in computations such as multiplication and division
Abacus - New World Encyclopedia An abacus (plurals abacuses or abaci), also called a counting frame, is a calculating tool for performing arithmetical processes, often constructed as a wooden frame with beads sliding on wires
Amazon. com: Abacus Abacus for Kids Math - Wooden Abacus with 100 Counting Sticks and 112 Math Cards, Counting Toys for Preschool Learning, Educational Math Toys for Developing Fine Motor Skills, Math Calculation 300+ bought in past month Ages: 36 months - 6 years Add to cart
Abacus Explained — Everything You Need To Know - History Tools This comprehensive guide will explain what an abacus is, how it works, its fascinating history, why it remains popular today, and how learning abacus calculation can improve your math skills!
Abacus - Math is Fun An abacus has beads that slide on rods It can be used to count, add, subtract, multiply and more Slide 3 beads UP on the right-most column 1 bead UP on the 2nd-from-right