Common Core: 1.OA — Operations & Algebraic Thinking
Grade 1 • subtraction • Medium
Subtraction Within 20 (Set B)
More practice subtracting within 20
12 problems
1.
20
-15
__
2.
20
-12
__
3.
1
-0
_
4.
2
-0
_
5.
3
-0
_
6.
4
-4
_
7.
4
-3
_
8.
5
-3
_
9.
6
-3
_
10.
7
-2
_
11.
8
-0
_
12.
8
-8
_