Common Core: 1.OA — Operations & Algebraic Thinking
Grade 1 • subtraction • Medium
Subtraction Within 20 (Set A)
Practice all subtraction facts within 20
12 problems
1.
19
-18
__
2.
20
-15
__
3.
20
-12
__
4.
1
-0
_
5.
2
-0
_
6.
3
-0
_
7.
4
-4
_
8.
4
-3
_
9.
5
-3
_
10.
6
-3
_
11.
7
-2
_
12.
8
-0
_