This summer, battle lines were drawn over a simple math problem: 8 ÷ 2(2 + 2 ... you’d probably use the standard algorithm you learned in elementary school, multiplying each digit from one number with ...

While the box method is essentially the same as the standard algorithm, it does a much nicer job of illustrating what's going on in a multiple-digit multiplication problem. 23 times 7 really just ...

How to multiply in your head Explore how to use mental methods for multiplication. Multiply a 2-digit by a 1-digit number Learn the mental method and written method for multiplying a 2-digit ...