DECOMPOS.BAS - GW-BASIC, simple multiplication via decomposition

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Jason Doucette

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Published on November 14, 2021 9:38:36 PM ● Video Link: https://www.youtube.com/watch?v=ly9yhzxmYUs

Duration: 0:30

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This must have been a method I read about or was taught in school to simplify multiplication by decomposing one of the two factors in the multiplication. instead of multiplying X by 38, do X * 30 and X * 8 instead, then add the two. Also, to avoid overflows, you can do X * 40 and X * -2 instead, and subtract, which this program shows.

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