Represent word problems involving addition and subtraction of whole numbers up to 20 using concrete and pictorial models and number sentences.

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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