Use the Unknown-Addend to Subtract: CCSS.MATH.CONTENT.1.OA.B.4 - Common Core: 1st Grade Math
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What can we add to 
to get 
What can we add to
or as a subtraction problem, 
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Compare your answer with the correct one above
What can we add to 
to get 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to 
to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to to get 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to to get 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to to get 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above
What can we add to to get to 
What can we add to
or as a subtraction problem, 
.
Compare your answer with the correct one above