3.MATH.4.B
Round to the nearest 10 or 100 or use compatible numbers to estimate solutions to addition and subtraction problems.
Grade 3 · Texas Essential Knowledge and Skills (TEKS) · TEKS 2012
Standard Unwrapping
AI-generated as a starting point — sign in to edit.Vocabulary
nearest 10nearest 100compatible numbersestimationsolutionsadditionsubtractionproblems
Skills
- round (whole numbers to the nearest 10 or 100) #dok1
- estimate (solutions to addition and subtraction problems using rounding) #dok2
- estimate (solutions using compatible numbers) #dok2
- select (appropriate strategy: rounding or compatible numbers, for estimating) #dok2
- solve (addition and subtraction problems using estimation) #dok2
Learning Targets
- I can round whole numbers to the nearest 10 or 100. #dok1
- I can identify compatible numbers for estimation. #dok1
- I can estimate the solution to an addition problem by rounding. #dok2
- I can estimate the solution to a subtraction problem using compatible numbers. #dok2
- I can determine which estimation strategy (rounding or compatible numbers) is more appropriate for a given problem. #dok2
- I can justify my choice of estimation strategy using examples. #dok3
Big Ideas
- Rounding and using compatible numbers help make addition and subtraction problems easier to solve mentally.
- Estimating solutions helps check for reasonableness and accuracy in real-world math situations.
Essential Questions
- When is it helpful to round numbers before adding or subtracting?
- What does it mean to use compatible numbers when estimating a solution?
- How do I decide if rounding or using compatible numbers is a better estimation strategy for a problem?
- How can estimation help me solve real-life addition or subtraction problems?
- Why is it important to check if my estimated answer is reasonable?