F-BF F‐BF.3 HSF-BF.A.1 F-BF HSF-BF.A.1 F-BF F-BF Building Functions F‐BF.3 F-BF F-BF Functions: Building Functions F-BF HSF-BF.A.1 Common Core standards F-BF Building Functions F-BF F‐BF.3 F-BF Common Core standards