Multiplication algorithm and lattice multiplication

This is a GOOD comparison between the standard multiplication algorithm and lattice multiplication!

The author even brings in the area model for multiplying multi-digit numbers (which I also show in Math Mammoth). The area model is of course only used to show students what is going on, based on place value -- not to replace any algorithm.

In our desire for "efficiency," we lose transparency in the standard "long multiplication" algorithm.
Read it at

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