做一做

1.

2.

9+1=□ 10-1=□ 8+2=□ 10-2=□

1+9=□ 10-9=□ 2+□=□ 10-□=□

7+3=□ 10-3=□ 6+□=□ 10-□=□

□+□=□ □-□=□ □+□+=□ □-□=□

做一做

1.找朋友

2.