Common Core: 1.OA
Answer Key
Grade 1additionMedium

Sums to 15 (Set C)

Additional drill with sums to 15

12 problems

1.
1
+0
_
2.
1
+10
__
3.
2
+ 8
__
4.
2
+6
_
5.
3
+4
_
6.
3
+2
_
7.
4
+1
_
8.
4
+10
__
9.
5
+ 8
__
10.
5
+ 6
__
11.
5
+4
_
12.
6
+3
_