• 1. (2024一下·南湖期末) 算一算

  11-5=	7+40=	68-8=	72-9=
  40+60=	15-9=	70-7=	8+52=
  5+33=	56-40=	51-6+40=	50-(13-5)=
  7+8+30=	16-(3+4)=	87+5-80=	27+(10-7)=