=(个)
方法一:=(个)
方法二:=(个)
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+=
-=
=(个)
=
个 个 个 个
7+=18 9- =7 - 2=10
+6>10 - 2<4 9->5
913 156+10 16-615
103+7 1611+2 17-512+5
3+7=
8-5=
0+12=
9-2-5=
10-5=
5+7=
14-4=
7+3+5=
8+8=
13-2=
9+7=
10-4+8=