2.MATH.2.A
Use concrete and pictorial models to compose and decompose numbers up to 1,200 in more than one way as a sum of so many thousands, hundreds, tens, and ones.
Grade 2 · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012
Standard Unwrapping
AI-generated as a starting point — sign in to edit.Vocabulary
concrete modelspictorial modelscomposedecomposenumbers up to 1,200sumthousandshundredstensones
Skills
- use (concrete and pictorial models) #dok1
- compose (numbers up to 1,200 as a sum of thousands, hundreds, tens, and ones) #dok2
- decompose (numbers up to 1,200 as a sum of thousands, hundreds, tens, and ones) #dok2
- represent (numbers in more than one way using models) #dok2
- explain (different ways to compose and decompose a number) #dok3
Learning Targets
- I can use concrete and pictorial models to show numbers up to 1,200. #dok1
- I can compose numbers up to 1,200 by combining thousands, hundreds, tens, and ones. #dok2
- I can decompose numbers up to 1,200 in more than one way using thousands, hundreds, tens, and ones. #dok2
- I can represent a number in different ways using models. #dok2
- I can explain how a number can be composed or decomposed in more than one way. #dok3
Big Ideas
- Numbers can be made up (composed) and broken down (decomposed) in many ways using place value.
- Using models helps us understand and show how numbers are constructed from thousands, hundreds, tens, and ones.
Essential Questions
- How can I break apart a number in different ways using thousands, hundreds, tens, and ones?
- Why do we use models to represent numbers?
- What does it mean to compose and decompose a number?
- How many different ways can a number be shown with models?
- How does understanding how to break apart numbers help me solve other math problems?