①3+4 ②4-2 ③8-1 ④5+3
4-=3
+2=7
+=7
0+=
+3=9
3+4= 6-3= 5-5= 2+3= 4-2=
4-0= 2+3= 7-4= 1+6= 5-0=
5+2= 3+1= 6-6= 7-1= 2+4=
0+2= 2+5= 1+4= 5-3= 4-1=
①一共有几人? ( )
②藏起来了几人?( )
③外面有几人? ( )
9
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5+( )=9
●●
2+( )=9
●●●●●●
6+( )=9
●
1+( )=9