It is really important that children learn their multiplication facts up to 12x12. Without the basic understanding of multiplication facts and the ability to recall these quickly, children face a huge challenge to understand the depth of operations being taught throughout the KS2 curriculum.
Fluency of multiplication facts is a strong determiner of future success in mathematics. Those children who can recall their multiplication and division facts have a stronger grasp of more complex mathematical concepts. Memorising multiplication facts will help children have a quicker recall and develop mathematical fluency. Children can then move away from relying on their fingers or other manipulatives to help them.