3rd Grade Math Unit 6

Big Idea:

Use the relationship between multiplication and division to solve multistep problems.

Student Expectations:

Priority TEKS

3.4(K) [Readiness] Solve one-step and two-step problems involving multiplication and division within 100 using strategies based on objects; pictorial models, including arrays, area models, and equal groups; properties of operations; or recall of facts.

3.5(B) [Readiness] Represent and solve one and two step multiplication and division problems within 100 using arrays, strip diagrams, and equations.

Focus TEKS

3.4(G) [Supporting] Use strategies and algorithms, including the standard algorithm, to multiply a two-digit number by a one-digit number. Strategies may include mental math, partial products, and the commutative, associative, and distributive properties.

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

Ongoing TEKS

3.4(F) [Supporting] Recall facts to multiply up to 10 by 10 with automaticity and recall the corresponding division facts.

3.4(H) [Supporting] Determine the number of objects in each group when a set of objects is partitioned into equal shares or a set of objects is shared equally.

3.4(J) [Supporting] Determine a quotient using the relationship between multiplication and division.

3.5(C) [Supporting] Describe a multiplication expression as a comparison such as 3 x 24 represents 3 times as much as 24.

3.5(D) [Supporting] Determine the unknown whole number in a multiplication or division equation relating three whole numbers when the unknown is either a missing factor or product.

3.6(D) [Supporting] Decompose composite figures formed by rectangles into non-overlapping rectangles to determine the area of the original figure using the additive property of area.

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

Student Learning Targets:

• I will solve one-step problems involving multiplication and division in a variety of ways.
• I will solve two-step problems involving multiplication and division in a variety of ways.
• I will represent and solve one step multiplication and division problems using arrays, strip diagrams, and equations.
• I will represent and solve two step multiplication and division problems using arrays, strip diagrams, and equations.
• I will multiply a two-digit number by a one-digit number by using commutative property.
• I will multiply a two-digit number by a one-digit number by using associative property.
• I will multiply a two-digit number by a one-digit number by using distributive property.
• I will multiply a two-digit number by a one-digit number by using partial products.
• I will multiply a two-digit number by a one-digit number by using mental math.
• I will represent real-world relationships using number pairs in a table.

Writing Prompt: When would you need to use a table to represent a real life relationship?

Stem: I would use a table to represent….

Prompt: Pick a strategy to multiply a two-digit number by a one-digit number, and describe the process.

Stem: Using the …..strategy, I will multiply….

Essential Questions:

• Why is it important to know what operation to use in different situations?
• Why is fluency in math computing important in life?
• How can the information in a problem be analyzed to determine the question being asked and relevant information provided and/or needed?

Extra Information:

Adopted Textbook: Pearson - enVision Math

District Grading Policy

Texas Gateway Online Resource Center