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Advanced Academic Programs (AAP)
Reply to "Is there a benefit to teaching “old math”?"
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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]OP here. For example, if I have to multiply 65 * 32, I write it vertically on paper or do it vertically in my head. 65 X 32 ——- 130 + 1950 ——— 2,080 But my kid does the distributive property breaking down the 65, etc. He doesn’t know how to do it the old way (above), so I am thinking of teaching him but not sure if it is worth it.[/quote] Lightning fast solution, just do 13*16 and add a 0, done.[/quote] How do you change 65*32 into 13*16 and just add a 0? That wouldn’t be intuitive to me.[/quote] Factor 65 = 13*5, and 32 = 2*16, then combine a 2 and 5 to make a 10 which adds a zero at the end.[/quote] I don't think that will save ANY time. It is literally easier to multiply 65 by 2 and then multiply 65 by 3 than to multiply 13*16[/quote]
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