Math Exercise on the Abacus (“Suanpan” in Chinese) • Teachers’ Introduction • Student Materials Introduction Practicing Basics Exercises Answer keys Learning: “Up‚” “Down‚” “Rid‚” “Advance” Cards 1-7 Cards 8-11 Cards 12‚ 14‚ 16 Cards 13‚ 15‚ 17 Card 18 Exercises: Addition Cards 18-28 Advanced Addition Cards 29-30 (the numbers 1-9) Exercises: Subtraction Cards 31-39 (the numbers 1-9) Acknowledgment: This unit is adapted from A Children’s Palace‚ by Michele Shoresman
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A Brief History of the Abacus Abacus is a Latin word that has its origins in the Greek words abax or abakon (meaning "table" or "tablet") which in turn‚ possibly originated from the Semitic word abq‚ meaning "sand" 1. Why does the abacus exist? It is difficult to imagine counting without numbers‚ but there was a time when written numbers did not exist. The earliest counting device was the human hand and its fingers. Then‚ as larger quantities (larger than ten human-fingers could represent) were
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The Chinese Abacus The Chinese Abacus is a simple device for performing mathematical calculations. The Chinese Abacus also known as a “Suanpan” in Chinese. The Abacus was first mentioned by the mathematician Xu Yueh at the end of Eastern Han Dynasty (25-220 A.D). The Abacus is a tool for calculating numbers‚ and was widely used in ancient times up to the invention of the modern mechanical and electronic calculators. The Abacus is similar to the modern calculator. It has a rectangular wooden frame
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Chinese Abacus The abacus‚ a very important invention‚ was invented in Ancient China. We still use abacus but know it is known as a calculator. The abacus is a wooden frame with rows of wood along which beads are slid. One famous mathematician named Cheng Dawei in ancient China invented the Abacus. The abacus was invented around 2600BC by the Chinese. A typical abacus has 13 columns that are divided into two with each column having two beads on top and five at the bottom. The abacus was invented
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F18-F16=F17 2584-987=1597 20. (F(n+1))^2+(F(n))^2=F(2n+1)‚ (F(n+1))^2-(F(n-1))^2=F(2n) 21. Arrangement of leaves on a plant stem Extra topics: 39. mathematician‚ 1170-1250 AD‚ Liber Abaci‚ used hindu-arabic # 40. methods of calculation without abacus 41. made easily accessible for many 42. 570-495 BC
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James Rodden Business Ethics Summer 2013 The Goldman Abacus Fund: Ethics You Can Count On Or Ethics That Don’t Add Up Set Up Imagine a physician is on the golf course with one of his colleagues‚ who happens to be a cardiologist. Somewhere on the back nine the cardiologist begins to tell the physician about one of his patients‚ a 52 year old man with blood pressure of 145/99‚ who is 40 lbs. overweight‚ chain smokes‚ and enjoys
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SALARY COMPA.RATIO Definition . Salary Range Midpoints and Market Reference Points (MRPs) represent the market average pay for positions. An employee’s salary compa-ratio indicates how his/her salary compares to the market. Salary compa-ratios should reflect employee work experience‚ skills and performance. o Compa-ratios are used to measure an employee’s pay relative to the market average pay for his/her position and to facilitate salary equity analyses among groups of employees. How to Calculate
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Taiwan in 1984 (over 26 years) • Professional institution specializes in Dual Hand Abacus Mental Arithmetic Program for Overall Brain Development • Founder of CMA “Dual-Hand‚ Four-Finger” Abacus technique • The curriculum we have tested and proved for more than two decades • Awarded the world’s Best Mental Arithmetic Trainer in 1991 • Director of the Association of Children’s Abacus Calculation in Taiwan • Authored more than 200 mental arithmetic books‚ VCDs‚ CDs and
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legal proceedings of the Abacus Federal Savings Bank located in China Town. Moreover‚ the documentary shows this family-operated bank in the process of an indictment to trial to verdict. As the only bank indicted on mortgage fraud during the 2008 housing crisis‚ Abacus’s noteworthy trial bears economic significance. The founder of Abacus‚ formally a lawyer‚ began banking for residents of china town who could not obtain credit otherwise. Complications originated for Abacus when one family member discovered
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The abacus‚ often called the earliest calculating machine in the world‚ has a long history. The earliest mention of the abacus can be dated back to the Eastern Han Dynasty‚ where it was mentioned in a book by Xu Yue in about 190 A.D‚ There was a time when numbers were not written. As larger numbers become needed past the amount on a human hand‚ various natural goods become items in the counting process. The history and evolution of the abacus is a long one and is often divided into three time periods
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