A:come
B:are coming
C:have come
D:had come
把4米长的铁丝平均分成9份,每份是全长的几分之几,每份是多少米?
①63.35-4.75+5.25
②3.89+2.67+0.15
③8.1+6.93+1.9+0.07
④46.5-(13.55+7.2)
⑤20-12.64-3.36
⑥39.74-(9.74+8.69)
在实数 227 , −5 , π2 , 83 ,3.14中,无理数有( )