APL wasn't about to bet that * is obviously over + in precedence. There everything is of equal precedence, right-to left. Until you put parenthesis. And that's

APL wasn't about to bet that * is obviously over + in precedence. There everything is of equal precedence, right-to left. Until you put parenthesis. And that's for verbs (monadic and dyadic operators over nouns), not for other parts...