598*49-597*49,754*324-754*314,37*46-18*37+37*72SOS

Question

598*49-597*49,754*324-754*314,37*46-18*37+37*72SOS

Answer 1

598*49-597*49=49*(598-597)=49*1=49
754*324-754*314=754*(324-314)=754*10=7540
37*46-18*37+37*72=37*(46-18+72)=37*100=3700

Comments

1)598•49-597•49=49 2)754•324-754•314=7500 3)37•46-18•37+37•72=3700