LEARNING THE "FAMILY" FORMULA USING BIG FRIEND AND LITTLE FRIEND IN MENTAL ARITHMETIC
Keywords:
abacus , big, friend, family, simple, calculations, unit, numbers.Abstract
The greatest schools in the world have embraced mental arithmetic as a popular academic topic. In addition to being taught in North America and Europe, it is a required subject in many Asian nations. In Russia, schools for this field of study are also starting to exist. This science has a lengthy and fascinating history of development.
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References
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