Seudónimo
Seudónimo
30-11-2016
Mathematics
contestada
54 times 81 in lattice multiplication
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spacehunter22
spacehunter22
30-11-2016
4374. You can draw 54 lines horizontally and 81 vertically, and count the intersections of the lines. Is this what your talking about? Not very efficient, I might add.
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