Numerals | Mathematical tools

Counting rods

Counting rods (traditional Chinese: 籌; simplified Chinese: 筹; pinyin: chóu; Japanese: 算木; rōmaji: sangi; Korean: sangaji) are small bars, typically 3–14 cm 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. The written forms based on them are called rod numerals. They are a true positional numeral system with digits for 1–9 and a blank for 0, from the Warring states period (circa 475 BCE) to the 16th century. (Wikipedia).

Counting rods
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This video explains how to use the stars and bars method of counting to solving a counting problem. mathispower4u.com

From playlist Counting (Discrete Math)

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From playlist Counting (Discrete Math)

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From playlist Shorts

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From playlist Counting (Discrete Math)

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From playlist Introduction to Fractions

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From playlist Shorter videos

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From playlist Timers

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From playlist Microsoft Excel tutorials

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From playlist MIT 22.01 Introduction to Nuclear Engineering and Ionizing Radiation, Fall 2016

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From playlist Multiplication and Division of Mixed Numbers

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From playlist Introduction to Whole Numbers

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From playlist QED- Prerequisite Topics

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From playlist Counting (Discrete Math)

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From playlist Counting (Discrete Math)

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