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This activity was used as an addition to the lesson "NBT1 Ford and Logan Add 45 +36" https://www.illustrativemathematics.org/content-standards/tasks/2068. As a variation of the lesson I started with placing ten sticks and ones in a cup. I wrote the number of cubes in the cup on a piece of paper and set it on top of the cup. Along side the cup I placed more ten sticks and ones. "How many cubes are there altogether?" Together we counted the cubes, using tens and ones language (5 tens plus 2 tens equals 7 tens). After the students were confident in combining tens and ones, with regrouping, I moved onto the attached sheet. This helped move the students from a concrete model to a pictorial representation. It was very important that they used precise language when combining the tens and ones.