• 1. (2023一上·洞头期中) 看谁算得又对又快

  2+3=	5-4=	3+4=	2-0=	7-4=
  5-1=	6+1=	7-5=	4+1=	5+2=
  2+5=	7-2=	0+3=	5-5=	6-3=
  5-1=	4-3=	6-6=	3+4=	1+5=