1.OA.A.1 (subraction)

There were 12 eggs in the refrigerator. Mom used 3 eggs for the cake. How many eggs were left?

There are 12 birds in a tree. 4 birds fly away. How many birds are left in the tree?
Which subtraction number sentence tells about the story?

•  $12-8=4$  

•  $8\ -\ 4=4$  

•  $12-3=9$  

•  $12-4=8$  

Uncle Mario sent Dion 9 shells. When they arrived, 5 were broken. How many shells were not broken?

Meg baked 6 muffins. She ate 3 muffins. How many muffins does she have now?

• 3

• 4

• 2

• 9

There were 13 marbles in the bag.

David took out 5 marbles.

How many marbles are left in the bag?