There is a very simple and important reason why children, and everyone else, should memorize basic multiplication tables. A great deal of life involves making reasonably quick and reasonably precise decisions with data.

It’s a necessity and your child is taught them while they are in elementary and middle school. Once a child has mastered the times tables, they begin to gain that foundation in the mathematics field. This is going to benefit them throughout middle school and into high school as well

By Ontario Ministry of Education Mathematics Curriculum Guidelines:

Grade 2 student need to memorize multiplication tables up to 6 and Grade 3 all of multiplication tables.