2.MATH.4.B
Add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations.
Grade 2 · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012
Standard Unwrapping
AI-generated as a starting point — sign in to edit.Vocabulary
additionsubtractionfactstwo-digit numbersmental strategiesalgorithmsplace valueproperties of operations
Skills
- add (up to four two-digit numbers using mental strategies and algorithms) #dok2
- subtract (two-digit numbers using mental strategies and algorithms) #dok2
- apply (knowledge of place value to addition and subtraction) #dok2
- use (properties of operations to solve computation problems) #dok2
Learning Targets
- I can recall and use strategies to add up to four two-digit numbers. #dok2
- I can use mental math to subtract two-digit numbers. #dok2
- I can use algorithms based on place value to add and subtract two-digit numbers. #dok2
- I can explain how place value helps when adding and subtracting larger numbers. #dok3
- I can choose and use properties of operations to solve addition and subtraction problems. #dok3
Big Ideas
- Understanding and using place value helps add and subtract larger numbers accurately.
- There are different strategies (mental and written) to solve addition and subtraction of two-digit numbers.
Essential Questions
- How does understanding place value help when adding or subtracting two-digit numbers?
- What different strategies can I use to add or subtract two-digit numbers accurately?
- When should I use mental math, and when should I use an algorithm?
- How can the properties of operations make addition and subtraction easier?
- How do I decide which strategy is best for different addition and subtraction problems?