Common Core: 1.OA
Answer Key
Grade 1additionChallenging

Mixed Addition Practice (Set C)

Additional mixed practice

12 problems

1.
2
+5
_
2.
3
+2
_
3.
0
+18
__
4.
4
+16
__
5.
5
+12
__
6.
6
+ 9
__
7.
7
+ 5
__
8.
8
+ 2
__
9.
15
+ 1
__
10.
2
+17
__
11.
6
+1
_
12.
11
+ 9
__