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Research Lesson Proposal for Kindergarten - Composing & Decomposing ...

K.OA.3: Decompose numbers less than or equal to 10 into pairs in more than one way (5=2+3 and 5=4+1). K.OA.4: For any number 1 to 9, find the number that makes 10 when added to the given number. K.NBT.1: Compose and decompose numbers from 11 to 19 into ten ones and some further ones (18=10+8); understand that these numbers are composed of