Common Core: 1.NBT
Answer Key
Grade 1mental-mathEasy

Doubles Plus One C

Additional doubles plus one practice

8 problems

1.
Doubles Plus One
9 + 8 =
Show your thinking:
2.
Doubles Plus One
10 + 9 =
Show your thinking:
3.
Doubles Plus One
1 + 2 =
Show your thinking:
4.
Doubles Plus One
3 + 2 =
Show your thinking:
5.
Doubles Plus One
3 + 4 =
Show your thinking:
6.
Doubles Plus One
5 + 4 =
Show your thinking:
7.
Doubles Plus One
5 + 6 =
Show your thinking:
8.
Doubles Plus One
6 + 7 =
Show your thinking: