2 + 2 = 4 is the easiest and most logical method. Of course, logic, reason, and rationailty are all foreign terms to the Common Core progressives who don’t want the children to engage in that type of thinking. No they want them to follow the procedural method outlined by the gubmint so hey will learn to say “yes, Master” without question.
There is a school in Tahiti called the 2+2=4 school. The man who donated it wanted to be sure the students who went there would at least learn one thing. Big sign over the entrance.