# Common Core: 1st Grade Math : Use the Unknown-Addend to Subtract: CCSS.MATH.CONTENT.1.OA.B.4

## Example Questions

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### Example Question #1 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get

Explanation:

or as a subtraction problem, .

### Example Question #2 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get to

Explanation:

or as a subtraction problem, .

### Example Question #3 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get

Explanation:

or as a subtraction problem, .

### Example Question #4 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get to

Explanation:

or as a subtraction problem, .

### Example Question #1 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get to

Explanation:

or as a subtraction problem, .

### Example Question #6 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get to

Explanation:

or as a subtraction problem, .

### Example Question #7 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get

Explanation:

or as a subtraction problem, .

### Example Question #11 : Operations & Algebraic Thinking

What can we add to  to get to

Explanation:

or as a subtraction problem, .

### Example Question #9 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get

Explanation:

or as a subtraction problem, .

### Example Question #10 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get to