People’s reasoning about physical and social explanations iswell understood (Keil, 2008). However, less is known abouthow people reason about mathematical explanations (Johnsonet. al., 2017). Experiment 1 replicates the central result ofJohnson et. al (2017), that people impose order on simplearithmetic explanations, as well as sets the limits of thatpreference. Experiment 2 extends the results of a second factor,the character of the relationship between the operations relatedby the explanation.