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.
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.