Determine the unknown whole number in an addition or subtraction equation when the unknown may be any one of the three or four terms in the equation.

Mathvideodefinition50 Additionandsubtractionconcepts Wordproblem Spanish
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Mathvideodefinition49 Additionandsubtractionconcepts Trueequation Spanish
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Mathvideodefinition48 Additionandsubtractionconcepts Thousandsplace Spanish
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Mathvideodefinition47 Additionandsubtractionconcepts Tensplace Spanish
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Mathvideodefinition46 Additionandsubtractionconcepts Tenframe Spanish
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Mathvideodefinition45 Additionandsubtractionconcepts Sum Spanish
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Mathvideodefinition44 Additionandsubtractionconcepts Subtrahend Spanish
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Mathvideodefinition43 Additionandsubtractionconcepts Subtractionstrategy Spanish
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Mathvideodefinition42 Additionandsubtractionconcepts Subtractionsentence Spanish
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