Napier’s method of multiplication is a method used to multiply large numbers when you do not have a calculator. Draw a 2 by 2 grid to multiply a 2-digit number by another 2-digit number. Label ...

It's not magic; it's mental math—a superpower you can learn! This article is your step-by-step guide to mastering mental multiplication of two-digit numbers.

Developmental milestones for the typical 4-year-old often include recognizing colors and counting 10 or more objects, but for a little boy from suburban Chicago, tackling three-digit multiplication ...