Mathematical construction, informal number work for busy hands; grades one and two (1911)
Laffin, Nora Louise, b. 1878 · Chicago : A. Flanagan Company · leaf 55
Like a cubewith two sidescut out. 48 MATHEMATICAL CONSTRUCTION LESSON XIX Box shape; 9 squares; straight cuts. When bottom rowis cut oS number relation is 1 to 3. When right row is cut off numberrelation is 1 to 3. Make cuts a b. Fold back 2, 3, and 1.The sum of 2 and 3 can be cut how manytimes out… … LESSON XX • 1 • \ I \f . N 1 / >. • 2 / ;\ / u _ N \ H 1 • \ . \/ \ • 1 % 1 N u___ .>*/. 1
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