Mathematical construction, informal number work for busy hands; grades one and two (1911)
Laffin, Nora Louise, 1878- · Chicago, A. Flanagan Company · leaf 70
asting colors. Fold one square into 2 equal oblongs, cut the half-inch strips for border (a, b) from folded edge. Divide folded edge into 2 equal parts at c. Divide a-c into 3 equal parts. Divide c-b into 3 equal parts. Cut an inch strip from other square.Divide large surface into 2 equal ob-longs,… … LESSON VII Material: Two oblongs 8x5,contrasting colors. Fold the one which is for the matso that the long edges meet. Cut as in-dicated at a, b, making strips for border. (Fig. 1.) Divide the fold between a and b into 5 equal parts, cutting to half an inch from top. B 64 MATHEMATICAL CONSTEUCTION…
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