Mathematics is often thought of as a subject that a student either understands or doesn't, with little in between. In reality, mathematics encompasses a wide variety of skills and concepts.
When good mathematicians are stuck on a problem, they see if they can simplify it. In long multiplication we break the sum down into parts that we can easily answer and then add the parts together ...
Napier’s method of multiplication is a method used to multiply large numbers when you do not have a calculator. Draw a 2 by 2 grid to multiply a 2-digit number by another 2-digit number.