Teen Numbers: Tens and Ones! Decomposing Teen Numbers

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During our Base 10 unit, students learn how to decompose teen numbers into sticks and squares/dots. This resource not only gives the students a visual of the teen number as two separate entities, but also helps them break the number down for themselves. I like to have students draw sticks and squares but for my friends with fine motor challenges, we use sticks and dots to represent the tens and ones.

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9 pages
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to see state-specific standards (only available in the US).
Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.


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