(1)(89+427)×3×9 =89×3×9+427×3×9 =24+4 =28 (2)56×59+59×16 =59×(56+16) =59×1 =59 (3)29×34+527×34 =34×(29+527) =34×(627+527) =34×1127 =1136 (4)38÷38×47+38×37 =38×1+38×47+38×37 =38×(1+47+37) =38×2 =34 (5)613×75-613×25 =613×(75-25) =613×1 =613 (6)712×6-512×6 =6×(712-512) =6×16 =1
