Curriculum  /  Math  /  4th Grade  /  Unit 6: Decimal Fractions  /  Lesson 13

Decimal Fractions

Lesson 13

Math

Unit 6

4th Grade

Lesson 13 of 13

Objective

Solve word problems involving money.

Common Core Standards

Core Standards

  • 4.MD.A.2 — Use the four operations to solve word problems involving distances, intervals of time, liquid volumes, masses of objects, and money, including problems involving simple fractions or decimals, and problems that require expressing measurements given in a larger unit in terms of a smaller unit. Represent measurement quantities using diagrams such as number line diagrams that feature a measurement scale.

Foundational Standards

  • 2.MD.C.8

Criteria for Success

  1. Make sense of a three-act task and persevere in solving it (MP.1).
  2. Solve word problems involving money (MP.4).

Tips for Teachers

  • “Students…combine competencies from different domains as they solve measurement problems using all four arithmetic operations, addition, subtraction, multiplication, and division” (MD Progression, p. 20). Thus, students will solve word problems involving money recorded as decimal quantities in this lesson, connecting the supporting work of measurement problems (4.MD.2) across domains to the major work with decimals (4.NF.C) as well as the major work of solving word problems using the four operations (4.OA.3).
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Anchor Tasks

25-30 minutes

Problem 1

Act 1: Look at the following image -

Then watch the video Piggy Bank.

a.   What do you notice? What do you wonder?

b.   Is there enough money in the piggy bank to purchase the paint set? Make an estimate of how much money is in the piggy bank. 

Guiding Questions

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Student Response

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Problem 2

Act 2: Use the following information to determine whether there is enough money in the piggy bank to buy the paint set.

  • There are 70 nickels in the piggy bank. 
  • There are 64 quarters in the piggy bank. 
  • There are 105 dimes in the piggy bank. 
  • There are 230 pennies in the piggy bank. 

Guiding Questions

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Student Response

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Problem 3

Act 3: Here is how much money is in the piggy bank –

Was your estimate reasonable? Why or why not?

Guiding Questions

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Student Response

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Problem 4

Act 4 (the sequel): If she buys the paint set, how much money will she have left over?

Guiding Questions

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Student Response

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Problem Set

15-20 minutes

Discussion of Problem Set

  • Why would Jenna give the clerk a $20 bill and a quarter in #4 rather than just a $20 bill?
  • How could you use rounding to find the reasonableness of your answer to #5? About how much do a pen and a calculator cost altogether? Are your answers reasonable? 

Target Task

5-10 minutes

Arturo needs $4 to buy candy after school. He searched the couch cushions and found 7 quarters, 3 nickels, and 21 pennies. How much more money does he need to be able to buy the candy?

Student Response

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Additional Practice

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.

Word Problems and Fluency Activities

Word Problems and Fluency Activities

Help students strengthen their application and fluency skills with daily word problem practice and content-aligned fluency activities.

Lesson Map

A7CB09C2-D12F-4F55-80DB-37298FF0A765

Topic A: Understanding Tenths

Topic B: Understanding Tenths and Hundredths

Topic C: Decimal Comparison

Topic D: Decimal Addition

Topic E: Money as a Decimal Amount

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