Multiplication table, "used as supplementary work in arithmetic class. From 2x2=4 to 25x25=625." The table is a pyramid that lists a number in bold, all digits below it (except 1), and the outcome if they were to be multiplied together. For example, the first line has a 2 with a smaller 2 over a 4 beside it, indicating that 2x2 = 4. The second line is a 3 followed by a 2 over a 6 and a 3 over a nine, showing 3x2=6 and 3x3=9. And so on through 25x25. The bottom of the card reads, "These cards will be furnished for 1c apiece without printing on reverse side. Educator Pub. Co., Marion, Iowa.
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Folder 8
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