2111121+1=2加号等于号减号等于号2132132132131+2=3+=+=1 +1 =2-=2 -1 =11 +2 =3+=3 -1 =2-2 +1=3+=-=3 -2 =11 +1 =2 +1 =233 -1 =3 -2 =213 -1 =2 +1 =2331123填2121111111223132212113332311212233211221121332112331123 -=2 -1=22 +=32 +1=+1=33 -2=3 -=1 -2 =1 +1=21 +=22 -=12 -1 =-1 =11 +2=1 +=3 +2=33 -1=1 +1=211112321213312123 盘子里一共有盘子里一共有3个苹果，小明拿走了个苹果，小明拿走了1个苹个苹果，还剩余几种苹果？果，还剩余几种苹果？
