(个)
9-0=
9-1=
9-2=
9-3=
9-4=
9-5=
9-6=
9-7=
9-8=
9-9=
10-0=
10-1=
10-2=
10-3=
10-4=
10-5=
10-6=
10-7=
10-8=
10-9=
10-10=
(1.)3+7=
A.5
(2.)4+5=
B.10
(3.)10-2=
C.9
(4.)9-4=
D.8
口算下面各题.
5+3=
8-7=
6+4=
9+1=
3+5=