Monograph, No. 9, Publications, Teaching Ideas Integer Sums and Differences December 1, 1987 Monograph No. 9: 56 Ideas – Make It, Take It December 1987 Publication of the Mathematics Council of The Alberta Teachers’ Association Editors William Bober and John Percevault Acknowledgements Robert Michie 45 Integer Sums and Differences Topic: Addition and subtraction of integers