+3=10 -6=3 5+=8 -2=7
7-=4 5=-4 -4=4 +=7
○○○○○○○
△△△△△△△△△
○比△少,△比○多;○比□多,□比△少;○与□合起来是。
+= +=
-= -=
9+1= 7-5= 5+4= 9-6= 8-6 + 2=
10-5= 6+2= 5-1= 4+3= 10 -7+4=
8-8= 0+9= 6-5= 4+5= 8-5 +7 =
6+4= 8-6= 9-3= 7-6= 2 + 7- 6=
5 0 3 6 10 7