3+7=?,9+?=18,15+?=31 ?-5=5,?-13=10,?-16=18 33-?=12,46-?=24,80-?=42 17+18=?,32+28=?,109-66=? 3*7=?,3*8=?,3*9=? --- ?+9=24-15,42-?=21+13 18+?+22=51,12+23+34+45=? 24+?=30-?,27+15+12+31=? 13+?=?+23,20-9+33-40=?
3
+
7
=
9
+
=
18
15
+
=
31
-
5
=
5
-
13
=
10
-
16
=
18
33
-
=
12
46
-
=
24
80
-
=
42
17
+
18
=
32
+
28
=
109
-
66
=
3
×
7
=
3
×
8
=
3
×
9
=
+
9
=
24
-
15
42
-
=
21
+
13
18
+
+
22
=
51
12
+
23
+
34
+
45
=
24
+
=
30
-
27
+
15
+
12
+
31
=
13
+
=
+
23
20
-
9
+
33
-
40
=
帅哥黄子诺