Multiplication Numbers & Operations in Base 10

Multiplication Algorithm



How did this kid come to believe in this algorithm?

Thanks to Amy Burk for the submission.

3 replies on “Multiplication Algorithm”

We taught the student that multiplication is repeated addition, so that’s what they did, repeated addition.

The part where they made some attempt to multiply the numbers and then scratched it out, that slays me.

Tamara Pearson says: “Students are so often told that multiplication is the same as repeated addition. This student is just misunderstanding the meaning of repeated addition.”

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