Description
Students represent teen number decompositions and compositions by writing addition sentences and number bonds. They compare teen numbers by counting and comparing the extra ones. They also reason to determine if they are decomposing or composing a teen number and analyze the number sentences that best represent each situation.
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Credits
From EngageNY.org of the New York State Education Department. Kindergarten Mathematics Module 5, Topic E.
Available from engageny.org/resource/kindergarten-mathematics-module-5-topic-e; accessed 2015-05-29.
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