Curriculum / Math / 3rd Grade / Unit 2: Multiplication and Division, Part 1 / Lesson 12
Math
Unit 2
3rd Grade
Lesson 12 of 21
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Solve one-step word problems involving multiplication and division using units of 3 and 4.
The core standards covered in this lesson
3.OA.A.1 — Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 × 7.
3.OA.A.2 — Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each. For example, describe a context in which a number of shares or a number of groups can be expressed as 56 ÷ 8.
3.OA.A.3 — Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
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Leah made sandwiches for her and her siblings every day during a week. She made 4 sandwiches each day. How many sandwiches did Leah make over the course of the week?
Jose and his two friends have 24 markers altogether. If they each have the same number of markers, how many markers does Jose have?
Cora went on a trip with her parents. She was bored at lunch and counted all the tires in the parking lot. If she counted 36 tires on cars, how many cars were in the parking lot?
3.OA Tasks from the 3-5 Formative Instructional and Assessment Tasks for the Standards in Mathematics, made available by the North Carolina Department of Public Instruction (NCDPI) Elementary Mathematics Consultants and their public school partners under the CC BY-NC-SA 3.0 license. Accessed Oct. 10, 2018, 3:44 p.m..
Problem Set
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There are 21 students in Ms. Montanez’s class. She puts the students into teams of 3. How many teams does Ms. Montanez make?
Robbie fills 3 baking sheets with cookies. Each baking sheet has 6 cookies on it. How many cookies does Robbie have altogether?
A florist has 32 roses. He wants to put an equal number of roses into 4 vases. How many roses should he put in each vase?
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The Extra Practice Problems can be used as additional practice for homework, during an intervention block, etc. Daily Word Problems and Fluency Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.
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Lesson 11
Lesson 13
Topic A: The Meaning of Multiplication and Division
Identify and create situations involving equal groups and describe these situations using the language and notation of multiplication.
3.OA.A.1
Identify and create situations involving arrays and describe these situations using the language and notation of multiplication.
Identify and create situations involving unknown group size and find group size in situations.
3.OA.A.1 3.OA.A.2 3.OA.A.3
Identify and create situations involving an unknown number of groups and find the number of groups in situations.
Relate multiplication and division and understand that division can represent situations of unknown group size or an unknown number of groups.
3.OA.A.1 3.OA.A.2 3.OA.A.3 3.OA.B.6
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Topic B: Multiplication and Division by 2, 5, and 10
Build fluency with multiplication facts using units of 2, 5, and 10.
3.OA.A.1 3.OA.C.7
Demonstrate the commutativity of multiplication.
3.OA.B.5
Build fluency with division facts using units of 2, 5, and 10.
3.OA.A.2 3.OA.B.6 3.OA.C.7
Solve one-step word problems involving multiplication and division using units of 2, 5, and 10.
Topic C: Multiplication and Division by 3 and 4
Build fluency with multiplication and division facts using units of 3.
3.OA.A.1 3.OA.A.2 3.OA.B.5 3.OA.B.6 3.OA.C.7
Build fluency with multiplication and division facts using units of 4.
Topic D: More Complex Multiplication and Division Problems
Determine the unknown whole number in a multiplication or division equation relating three whole numbers, including equations with a letter standing for the unknown quantity.
3.OA.A.4 3.OA.C.7 3.OA.D.8
Solve one-step word problems involving multiplication and division and write problem contexts to match expressions and equations.
Solve two-step word problems involving multiplication and division.
3.OA.D.8
Solve two-step word problems involving all four operations.
Topic E: Scaled Picture and Bar Graphs
Create scaled picture graphs where the scale is provided.
3.MD.B.3
Create scaled picture graphs where the scale must be determined.
Create scaled bar graphs where the scale is provided.
Create scaled bar graphs where the scale must be determined.
Solve one- and two-step word problems using information presented in scaled picture and bar graphs.
3.MD.B.3 3.OA.D.8
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