Curriculum / Math / 3rd Grade / Unit 2: Multiplication and Division, Part 1 / Lesson 14
Math
Unit 2
3rd Grade
Lesson 14 of 21
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Solve one-step word problems involving multiplication and division and write problem contexts to match expressions and equations.
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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For each of the following problems,
a. Nadeem is reading a book. It takes him 7 minutes to read each page. How many minutes will it take for Nadeem to read 10 pages?
b. Helen spent some money on her 3 grandchildren at the fair. If she spent a total of $12, how much did she spend on each grandchild?
c. Kiara is making saris. She has 30 meters of fabric and needs 5 meters to make each sari. How many saris can Kiara make?
Gifts from Grandma, Variation 1, accessed on Oct. 10, 2018, 4 p.m., is licensed by Illustrative Mathematics under either the CC BY 4.0 or CC BY-NC-SA 4.0. For further information, contact Illustrative Mathematics.
For each part below, write a word problem that can be represented with the given expression.
a. $$4 \times 6$$
b. $$15 \div 3$$
Problem Set
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Which problem can be solved using the expression $$3\times 5$$?
Four siblings equally split the cost of a Mother’s Day gift. If the gift cost $24, how much does each of them pay?
An example response to the Target Task at the level of detail expected of the students.
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 13
Lesson 15
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.
Solve one-step word problems involving multiplication and division using units of 3 and 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 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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