This Maths article explains both the mental method and written method for multiplying a 2-digit number by a 1-digit number.

Then take the two numbers you want to multiply—in the case of the above image, 7 and 8—and put together the corresponding fingers (as shown in the picture to the right).

Learn how to multiply 2-digit numbers mentally with this step-by-step guide for kids. Discover simple techniques to boost calculation speed, improve mental math skills, and build confidence for ...

The new technique is for really large numbers, and if it passes a peer-review, could be the fastest possible way of multiplying whole numbers.

This Maths article explains both the mental method and written method for multiplying a 2-digit number by a 1-digit number.