1.MATH.3.E

Explain strategies used to solve addition and subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences.

Grade 1 · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012

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Vocabulary
strategiesaddition problemssubtraction problemsspoken wordsobjectspictorial modelsnumber sentences
Skills
  • explain (strategies used to solve addition and subtraction problems up to 20) #dok3
  • use (spoken words to describe mathematical thinking) #dok2
  • use (objects to represent strategies) #dok2
  • use (pictorial models to show solution strategies) #dok2
  • use (number sentences to explain strategies) #dok2
Learning Targets
  • I can describe strategies I use to solve an addition or subtraction problem up to 20 using spoken words. #dok2
  • I can show how I solve addition and subtraction problems with objects, drawings, and models. #dok2
  • I can write a number sentence to match and explain a strategy for addition or subtraction. #dok2
  • I can explain my thinking process for solving an addition or subtraction problem using words, objects, drawings, and number sentences. #dok3
Big Ideas
  • Explaining, showing, and justifying strategies helps develop a deeper understanding of addition and subtraction.
  • Students can use multiple representations—words, objects, drawings, and number sentences—to model and explain their mathematical thinking.
Essential Questions
  • How can I explain how I solved an addition or subtraction problem using different models or representations?
  • Why is it important to be able to explain my math thinking using words, pictures, objects, or number sentences?
  • What strategies can I use to solve addition and subtraction problems up to 20?
  • How do different representations help me understand and solve math problems?
  • In what ways can sharing my strategies help others learn?