• 1. (2024一下·龙湖期中) 我会算

  12-5=	14-7=	49-9=	13-7=	20+5=
  18-9=	98-90=	60+4=	69-9=	87-80=
  16-8=	74-70=	15-8=	73-3=	28-20=
  40+8=	11-6=	5+60=	85-5=	14-6=