20 以内减法
日期：___________
姓名：___________
用时：___________
成绩：___________
14 - 14 =
13 - 4 =
4 - 3 =
16 - 3 =
1 - 0 =
14 - 13 =
4 - 1 =
11 - 10 =
7 - 5 =
15 - 4 =
16 - 7 =
4 - 0 =
14 - 0 =
15 - 9 =
16 - 1 =
1 - 0 =
9 - 6 =
20 - 12 =
3 - 2 =
20 - 8 =