Mental calculation strategies for the addition and substraction of 2-digit numbers
by Ian Thompson
1999
University of Newcastle, Department of Education·1 editions
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Mental calculation strategies for the addition and substraction of 2-digit numbers (1999)
Mental calculation strategies for the addition and substraction of 2-digit numbers (1999)
University of Newcastle, Department of Education
University of Newcastle, Department of Education
ISBN 10: 0701700831