The first set of multiplication facts that should be learned are the 2’s facts. Facts that have 2 as a factor are equivalent to the addition doubles (e.g., 2 x 6 is equivalent to 6 + 6) and should already be known by students who know their addition facts.
Thirty‐six facts have at least one factor that is either 0 or 1. These facts, though apparently easy, tend to get confused with “rules” that some children learned for addition. Above all else, avoid rules that sound arbitrary and without reason such as “Any number multiplied by zero is zero”.