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.
19 facts have zero as one of the addends. Although these facts seem to be the simplest of all, some students will overgeneralize the idea that answers to addition are bigger. Putting these facts into real life situations oftentimes help the students to reinforce the zero rule.