Place Value with Decimals

Lesson 3

Math

Unit 1

5th Grade

Lesson 3 of 13

Objective


Explain patterns in the number of zeros of the product when multiplying a whole number by 10. Recognize that in a multi-digit whole number, a digit in any place represents 10 times as much as it represents in the place to its right. 

Common Core Standards


Core Standards

  • 5.NBT.A.1 — Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
  • 5.NBT.A.2 — Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10.

Foundational Standards

  • 4.NBT.A.1

Criteria for Success


  1. Multiply whole numbers by 10.
  2. Generalize the pattern that multiplying a whole number by 10 results in digits in the number shifting one place to the left (MP.8).
  3. Understand that a digit in one place represents 10 times what it represents in the place to its right.

Tips for Teachers


This lesson is directly aligned to work students did in Grade 4. Thus, it can be combined with the next lesson if they seem to be adept with this content.

Lesson Materials

  • Millions Place Value Chart (2 per student) — Students might need more or less depending on their reliance on this tool.
  • Base ten blocks (50 hundreds, 40 tens, 80 ones per student or small group) — Students might not need these depending on their reliance on concrete materials. You could just use one set for the teacher if materials are limited.
Fishtank Plus

Unlock features to optimize your prep time, plan engaging lessons, and monitor student progress.

Anchor Tasks


Problem 1

a.   Solve. 

  1. $$\times$$ 10 = ___________
  2. 500 $$\times$$ 10 = ___________
  3. 48 $$\times$$ 10 = ___________
  4. 3,020 $$\times$$ 10 = ___________

b.   What do you notice about Part (a)? What do you wonder?

Guiding Questions

Create a free account or sign in to access the Guiding Questions for this Anchor Problem.

Problem 2

The value of the 2 in 124,837 is how many times the value of the 2 in 82,560?

Guiding Questions

Create a free account or sign in to access the Guiding Questions for this Anchor Problem.

Problem Set


Answer Keys

Unlock the answer keys for this lesson's problem set and extra practice problems to save time and support student learning.

Discussion of Problem Set

  • Look at #1h and #1i. What do you notice about the solutions to these problems? Is there a way you could write this as one multiplication sentence to get from the first factor in (h) to the product in (i)?
  • Look at #2. How did you solve these? Did anyone convert the word sentence to a number sentence? How was that helpful? 
  • Look at #2g and #2h. What was similar about these problems? What was different? 
  • Look at #4. What numbers did you write? How did you make sure they met the criteria? 

Target Task


Problem 1

The number 234 is multiplied by 10. What is the value of the 2 in the product?

Problem 2

In which number does the 2 represent a value 10 times the value represented by the 2 in 82,401?

Create a free account or sign in to view multiple choice options

Student Response

Create a free account or sign in to view Student Response

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.

Extra Practice Problems

Answer Keys

Answer keys for Problem Sets and Extra Practice Problems are available with a Fishtank Plus subscription.

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.

icon/arrow/right/large copy

Lesson 2

icon/arrow/right/large

Lesson 4

Lesson Map

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

Topic A: Place Value with Whole Numbers

Topic B: Place Value with Decimals

Topic C: Reading, Writing, Comparing, and Rounding Decimals

Request a Demo

See all of the features of Fishtank in action and begin the conversation about adoption.

Learn more about Fishtank Learning School Adoption.

Contact Information

School Information

What courses are you interested in?

ELA

Math

Are you interested in onboarding professional learning for your teachers and instructional leaders?

Yes

No

Any other information you would like to provide about your school?

Effective Instruction Made Easy

Effective Instruction Made Easy

Access rigorous, relevant, and adaptable math lesson plans for free