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=

10

5 + 3 =

8 – 7 =

4 + 5=

2 + 7=

6 - 4 =

10 – 3 =

7 – 4 =

0 + 8 =