Donald J. Trump (@realDonaldTrump) June 9, 2018 A fired-up Mudd told Wolf Blitzer tonight, “He just threw a fourth-grade hissy fit. I would’ve been kept behind… for that hissy fit in fourth ...

In fourth grade, students focus most on using all four operations - addition, subtraction, multiplication, and division - to solve multi-step word problems involving multi-digit numbers.