Curriculum  /  Math  /  6th Grade  /  Unit 3: Multi-Digit and Fraction Computation  /  Lesson 9

Multi-Digit and Fraction Computation

Lesson 9

Math

Unit 3

6th Grade

Lesson 9 of 17

Objective

Multiply decimals using the standard algorithm.

Common Core Standards

Core Standards

  • 6.NS.B.3 — Fluently add, subtract, multiply, and divide multi-digit decimals using the standard algorithm for each operation.

Foundational Standards

  • 5.NBT.B.5
  • 5.NBT.B.7

Criteria for Success

  1. Multiply decimals using the standard algorithm.
  2. Solve word problems involving decimals using the standard algorithm. 

Tips for Teachers

  • Multiplying with decimals is a fluency expectation in sixth grade. Ensure students have opportunities to build towards fluency throughout the unit and the year. There are two quick Anchor Problems in this lesson in order to leave plenty of time for practice. Students can get further practice with this skill when they get to division with decimals; students can use multiplication to check their answers. See our Guide to Procedural Skill and Fluency for additional notes and strategies.

Lesson Materials

  • Graph Paper (2-3 sheets per student)
  • Optional: Calculators (1 per student) — Calculators can be used to check answers.
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Anchor Problems

25-30 minutes

Problem 1

Calculate the product using the standard algorithm: $${306.32 \times 8.4}$$

Guiding Questions

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Student Response

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Problem 2

At the grocery store, ground beef is on sale for $4.25 per pound. How much would 3.75 pounds of ground beef cost? Round your answer to the nearest cent.

Guiding Questions

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Student Response

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Problem Set

15-20 minutes

Give your students more opportunities to practice the skills in this lesson with a downloadable problem set aligned to the daily objective.

Target Task

5-10 minutes

Problem 1

Find the product of 39.56 and 65.8.

Student Response

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Problem 2

Gas costs $2.89 per gallon, and Alex fills his gas tank with 12.06 gallons. How much does he pay for gas? Give your answer to the nearest penny.

Student Response

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Additional Practice

The following resources include problems and activities aligned to the objective of the lesson that can be used for additional practice or to create your own problem set.

  • Include opportunities for procedural practice. A search for “decimal multiplication problems” will result in several different worksheets.

Word Problems and Fluency Activities

Next

Divide multi-digit whole numbers using the standard algorithm.

Lesson 10
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Lesson Map

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

Topic A: Dividing with Fractions

Topic B: Computing with Decimals

Topic C: Applying the Greatest Common Factor and the Least Common Multiple

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