_____+5=13 _____- 6=4 6+_____=18
A. B. C.
12+6=
6+7=
7+5=
17-2=
11+3=
15-4=
4+8=
15-7=
17-8=
18-9=
11-6=
14-8=
16-716-6 2+618-7 7+44+6
12-613-7 15-614-7 12-714-6
(根)
(支)
(张)
(顶)