Question

怎样简便就怎样计算．57.5-4.25-15.75　　　　125×32　　　 5 7 ×16.31-2.31÷ 7 5

Answer 1

①57.5-4.25-15.75=57.5-（4.25+15.75）=57.5-20=37.5；②125×32=125×8×4=1000×4=4000；③ 5 7 ×16.31-2.31÷ 7 5 = 5 7 ×16.31-2.31× 5 7 = 5 7 ...