Mathematical construction, informal number work for busy hands; grades one and two (1911)
Laffin, Nora Louise, b. 1878 · Chicago : A. Flanagan Company · leaf 31
Fio. a.. 24 MATHEMATICAL CONSTRUCTION repeat questions on relations of surfaces as before. Viz.: Ifit takes an hour to hem this side (pointing to d) will it takemore or less to hem this (pointing to c) ? Ans.. More thanan hour, etc. Fold back oblong and tear off. Eesult: A dolls shawl. Surface Seen… … Suggestive comparisons on which to base problems: A=3 of C. E=2 of C. =3 of B. =2 of B. =sum of B+E. =D. =sum, of D+B. =sum of B+C. =sum of E+C. =8um of D+C. FOLDING 25 B=| of E.=i of D.=i of A. D=2 of B.=2 of C.=E.=A-B.=sum of B+C, Note.—If child does not see the relations of the surfaces, cut…
Manual training · Paper work
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