Common Core: 1.OA
Answer Key
Grade 1additionChallenging

Mixed Addition Practice (Set B)

More mixed practice

12 problems

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