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Direct linkKartambis, Kathy – Australian Primary Mathematics Classroom, 2007
Research has established that children's development of addition and subtraction skills progresses through a hierarchy of strategies that begin with counting-by-one methods through to flexible mental strategies using a combination of knowledge of basic facts and understanding of place value. An important transition point is the shift from the…
Descriptors: Mental Computation, Number Concepts, Subtraction, Arithmetic
