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9 x 4 = 37

"By using pebbles, blocks, rods, colored lines and tables to learn mathematics, teachers help students extract patterns and relationships and systems. Shows how students master computation much earlier than usual. Examples include a boy who first proves to himself that "nine fours is thirty-seven", only to change his mind after recess; and some 5th graders who multiply together two four-figure numbers in their heads, writing down only the answer." [http://troy.lib.sfu.ca/record=b2981176~S1a]

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