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 ...

In National 4 Maths multiply a number given to two decimal places by a single-digit whole number and by multiples of 10, 100 and 1000.

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

So when multiplying by an even number, first multiply by half that number, then by 2. Multiply by 5: First multiply by 10, then divide by 2. Multiply by 9: Multiply by 10 and subtract the number.

Multiply by 4 using the grouping of objects, arrays, and facts you already know.