-1
1 - 1 = 0
2 - 1 = 1
3 - 1 = 2
4 - 1 = 3
5 - 1 = 4
6 - 1 = 5
7 - 1 = 6
8 - 1 = 7
9 - 1 = 8
10 - 1 = 9
11 - 1 = 10
12 - 1 = 11
-2
2 - 2 = 0
3 - 2 = 1
-3
3 - 3 = 0
4 - 3 = 1
-10
13 - 10 = 3
14 - 10 = 4
15 - 10 = 5
16 - 10 = 6
17 - 10 = 7
18 - 10 = 8
19 - 10 = 9
20 - 10 = 10
21 - 10 = 11
-11
14 - 11 = 3
15 - 11 = 4
16 - 11 = 5
17 - 11 = 6
18 - 11 = 7
19 - 11 = 8
20 - 11 = 9
21 - 11 = 10
22 - 11 = 11
-12
12 - 12 = 0
13 - 12 = 1
14 - 12 = 2
15 - 12 = 3
16 - 12 = 4
17 - 12 = 5
18 - 12 = 6
19 - 12 = 7
20 - 12 = 8
21 - 12 = 9
22 - 12 = 10
23 - 12 = 11
Parent Tip: Review the logic above to help your child master the concept of subtraction table worksheet.