• 1. (2024一上·嘉兴期中)  口算我最快。

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