1.开火车,算一算
8 – 4 =
10 – 5=
4 + 5=
8 - 2=
6 + 3 =
3 + 4=
8 - 5=
7 - 5=
8 – 6 =
7 + 3=
10
9 - 6=
6 + 4=
5 + 3 =
8 – 7 =
2 + 7=
6 - 4 =
10 – 3 =
7 – 4 =
0 + 8 =