The process of multiplying three numbers together is similar to the process of multiplying two numbers, but it has one extra step. First, you multiply two of the numbers, then you multiply the third ...

Addition involves finding the total of two or more numbers or amounts. There are different things you can use to help you add. You can use number lines, place value charts and place value counters.

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 ...