### Common Core State Standard

### 2.OA.B.2

Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

*CCSS: 2.OA.B.2, 3.OA.C.7*

The villagers are trying to tear down your castle. They're armed with equations. You know what to do!

*CCSS: 2.OA.B.2*

Practice adding to 11 in this fun Zuma-like game Shoot the numbered marble from the cannon into a numbered marble such that the numbers total 11. One of our most popular series of games.

*CCSS: 2.OA.B.2*

Practice adding to 12 in this fun Zuma-like game Shoot the numbered marble from the cannon into a numbered marble such that the numbers total 12. One of our most popular series of games.

*CCSS: 2.OA.B.2*

Practice adding to 13 in this fun Zuma-like game Shoot the numbered marble from the cannon into a numbered marble such that the numbers total 13. One of our most popular series of games.

*CCSS: 2.OA.B.2*

Practice adding to 14 in this fun Zuma-like game Shoot the numbered marble from the cannon into a numbered marble such that the numbers total 14. One of our most popular series of games.

*CCSS: 2.OA.B.2*

Practice adding to 15 in this fun Zuma-like game Shoot the numbered marble from the cannon into a numbered marble such that the numbers total 15. One of our most popular series of games.

*CCSS: 2.OA.B.2*

Decorate the tree by shooting the numbered Christmas balls from a candy cane to build numbers that match spots on the tree. Decorate as many trees as you can before the clock reaches midnight.