Common Core: 1.OA — Operations & Algebraic Thinking
Grade 1 • subtraction • Medium
Subtraction Within 20 (Set D)
Keep practicing subtraction within 20
12 problems
1.
1
-0
_
2.
2
-0
_
3.
3
-0
_
4.
4
-4
_
5.
4
-3
_
6.
5
-3
_
7.
6
-3
_
8.
7
-2
_
9.
8
-0
_
10.
8
-8
_
11.
9
-7
_
12.
10
- 6
__