# Common Core: 1st Grade Math : Adding and Subtracting Within 20

## Example Questions

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### Example Question #1 : Adding And Subtracting Within 20

Fill in the blank. _________,

Explanation:

In this series we are adding  each time, or counting by , ,  and

### Example Question #1 : Relate Counting To Addition And Subtraction: Ccss.Math.Content.1.Oa.C.5

Fill in the blank , , __________, ,

Explanation:

In this series we are adding  each time, or counting by , and

### Example Question #3 : Relate Counting To Addition And Subtraction: Ccss.Math.Content.1.Oa.C.5

Fill in the blank , , , __________,

Explanation:

In this series we are adding  each time, or counting by  and .

### Example Question #1 : Adding And Subtracting Within 20

Fill in the blank: , , ,__________,

Explanation:

In this series we are adding  each time, or counting by , and .

### Example Question #2 : Relate Counting To Addition And Subtraction: Ccss.Math.Content.1.Oa.C.5

Fill in the blank: , , , __________

Explanation:

In this series we are adding  each time, or counting by , and

### Example Question #2 : Adding And Subtracting Within 20

Fill in the blank: , , , , __________,

Explanation:

In this series we are adding  each time, or counting by  and and

### Example Question #7 : Relate Counting To Addition And Subtraction: Ccss.Math.Content.1.Oa.C.5

Fill in the blank: , , , , __________,

Explanation:

In this series we are adding  each time, or counting by ,  and  .

### Example Question #2 : Adding And Subtracting Within 20

Fill in the blank: , , ,, __________

Explanation:

In this series we are adding  each time, or counting by , and

### Example Question #1 : Adding And Subtracting Within 20

Fill in the blank: , __________, ,

Explanation:

In this series we are adding  each time, or counting by . , .

### Example Question #3 : Relate Counting To Addition And Subtraction: Ccss.Math.Content.1.Oa.C.5

Fill in the blank: , , __________,