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Paperback. Pub Date:2013-12-01 Pages: 100 Language: Chinese Publisher: Central China Normal University Press. port operator mental arithmetic exercises or exercises cards. is the current mainstream basic math learning products. the majority of parents. students and teachers welcomed. the learning effect is very good. role in the consolidation of mathematical concepts. strengthening exercises aspect is very significant. Pre-school must-mouth mental arithmetic: addition and subtraction within 100 'of Qi Feng teacher well-written. books in ensuring the learning situation. you can better promote students' overall math learning ability. Pre-school must-mouth mental arithmetic: addition and subtraction within 100 on the basis of traditional products to do a comprehensive upgrade and breakthroughs. the learning effect is more significant. Contents: Recognizing the number of palm...