(枝)
3+8= 5+5= 18-8+4= 14-4-3=
6+9= 12-10= 9+1-3= 4+0+6=
4+9= 18-3= 6+8+3= 9-5+4=
买来了几只西瓜?
现在还剩几只西瓜?
现在一共有几只西瓜?
□○□○□=□(个)
>5 10= <2 8>
1÷0.25= +1 = ×24= + =
400×0.02= 10÷ = 6 ×0= 3× ﹣ ×3=