3rd Grade Math Unit 3

Big Idea:

Represent and solve multi-step problems using different addition and subtraction strategies.

Student Expectations:

Priority TEKS

3.4(A) [Readiness] Solve with fluency one-step and two-step problems involving addition and subtraction within 1,000 using strategies based on place value, properties of operations, and the relationship between addition and subtraction.

3.4(B) [Supporting] Round to the nearest 10 or 100 or use compatible numbers to estimate solutions to addition and subtraction problems.(start with this TEK)

3.5(A) [Readiness] Represent one- and two-step problems involving addition and subtraction of whole numbers to 1,000 using pictorial models, number lines, and equations.

3.7(B) [Readiness] Determine the perimeter of a polygon or a missing length when given perimeter and remaining side lengths in problems.

Focus TEKS

3.5(E) [Readiness] Represent real-world relationships using number pairs in a table and verbal descriptions.

Ongoing TEKS

3.2(B) [Supporting] Describe the mathematical relationship found in the base-10 place value system through the hundred thousands place.

Student Learning Targets:

• I will round to the nearest 10 or 100 to solve estimate solutions.
• I will represent one-step problems using pictorial models
• I will represent one-step problems using number lines
• I will represent one-step problems using equations
• I will represent two-step problems using pictorial models,
• I will represent two-step problems using, number lines
• I will represent two-step problems using equations
• I will solve one- and two-step problems using strategies based on place value.
• I will solve one- and two-step problems using properties of operations.
• I will solve one- and two-step problems using the relationship between addition and subtraction.
• I will determine the perimeter of a polygon
• I will determine a missing length when given perimeter and remaining side lengths in problems

Writing Prompt: When would you need to find the perimeter of something in real life, and how would you do it?

Stem: I need to find the perimeter of….

To find the perimeter, I would...

Essential Questions:

• Why is it important to know what operation to use in different situations?
• How does reasoning relate to mathematical operations?

Extra Information:

Adopted Textbook: Pearson - enVision Math

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