In long multiplication, we have to multiply every digit of the first number by every digit of the second number. If the two numbers each have N digits, that's N 2 (or N x N ) multiplications ...

Indeed, when it comes to multiplying two numbers, the best (or fastest) way to do it is often far from obvious. One particularly intriguing and efficient multiplication algorithm was developed in ...

Learn how to multiply 2-digit numbers mentally with this step-by-step guide for kids. ... Example for Two 2-Digit Numbers: 49x23. Round One Number: Round 49 up to 50. (49 is 50−1) ...

This Maths article explains both the mental method and written method for multiplying a 2-digit number by a 1-digit number. ... 2 × 6 = 12. Add the two answers together. 180 + 12 = 192.