20 以内减法
日期：___________
姓名：___________
用时：___________
成绩：___________
19 - 10 =
15 - 9 =
0 - 0 =
16 - 2 =
9 - 4 =
4 - 3 =
14 - 6 =
16 - 13 =
1 - 0 =
8 - 3 =
19 - 7 =
10 - 5 =
9 - 1 =
16 - 8 =
14 - 8 =
15 - 3 =
6 - 0 =
15 - 6 =
6 - 1 =
20 - 16 =