by AA.VV., R.M. Martín · Editorial Edarca · tapa blanda · ISBN 9788486545291
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«Iniciación a la suma» is the arithmetic workbook by AA.VV. and R.M. Martín, published by Editorial Edarca in paperback (16 pages, in Spanish).
Workbook from the Castillo Cálculo series devoted to beginning addition. Includes addition without carrying with one-, two- and three-digit numbers, along with exercises for continuing number sequences and other calculation and reasoning activities.
It is number 1 in the Castillo Cálculo series, within the C.MATEMATICAS PRIMARIA collection. Originally published in 1988.
Aimed at elementary school students, from age 6, as reinforcement material or for classroom work to begin learning addition.
Richard M. Lerner is professor of Human Development at Tufts University, occupying the Bergstrom Chair in Applied Developmental Science. Also at Tufts, he directs the Institute for Applied Research in Youth Development. He did his undergraduate work at Hunter College, graduating in 1966.
