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Multiply It Up!

Lesson Plan

Multiply It Up!

Students will be able to successfully multiply multi-digit numbers using various strategies, understanding the process of carrying over and place value.

Multidigit multiplication is a foundational math skill that helps students tackle more complex problems in the future and apply math in real-world scenarios, like calculating costs or measurements.

Audience

4th Grade Students

Time

45 minutes

Approach

Through direct instruction, guided practice, and independent application.

Materials

Multidigit Multiplication Slide Deck, Multidigit Multiplication Slide Deck, Multidigit Multiplication Review Worksheet, and Multidigit Multiplication Review Worksheet

Prep

Substitute Preparation

10 minutes

Step 1

Introduction & Warm-Up

5 minutes

  • Greet students and briefly introduce today's topic: multidigit multiplication.
    - Ask students to share what they already know about multiplication. (e.g., "What is multiplication? What are some strategies you use?")

Step 2

Direct Instruction: Understanding Multidigit Multiplication

15 minutes

  • Present the Multidigit Multiplication Slide Deck, starting from Slide 1.
    - Follow the teacher notes on each slide to explain the concept of multidigit multiplication, breaking down the steps clearly.
    - Emphasize place value and the process of carrying over numbers.
    - Use the examples provided on the slides for demonstration and guided practice.

Step 3

Guided Practice

10 minutes

  • Work through a few more examples of multidigit multiplication problems together as a class.
    - Encourage students to participate by calling out steps or solutions.
    - Address any misconceptions or questions immediately.

Step 4

Independent Practice: Review Worksheet

10 minutes

  • Distribute the Multidigit Multiplication Review Worksheet to each student.
    - Instruct students to work independently on the problems.
    - Circulate around the room to provide individual support and answer questions as needed.

Step 5

Wrap-Up & Share

5 minutes

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Slide Deck

Multiply It Up! Mastering Multidigit Multiplication

Get ready to become multiplication masters!

Welcome students and introduce the topic. Ask what they already know about multiplication. Set the stage for learning a new strategy.

What is Multidigit Multiplication?

It's when we multiply numbers that have more than one digit (like 24 x 13).
We'll break it down into smaller, easier steps!

Explain what multidigit multiplication means – multiplying numbers with more than one digit. Use a simple example to illustrate.

Quick Review: Place Value Power!

Remember our friends: Ones, Tens, Hundreds, and so on.
Their position gives them power!

Briefly review place value as it's critical for understanding multidigit multiplication. Emphasize ones, tens, hundreds.

Step 1: Multiply by the Ones Place

Start by multiplying the ones digit of the bottom number by every digit in the top number, starting from the right.
Don't forget to regroup (carry over) if needed!

Explain the first step: multiplying the bottom number's ones digit by each digit of the top number. Show an example visually.

Step 2: Multiply by the Tens Place

Now, multiply the tens digit of the bottom number by every digit in the top number.
IMPORTANT: Before you start, put a zero in the ones place as a placeholder!

Explain the second step: multiplying the bottom number's tens digit. Crucially, remind students about placing a zero as a placeholder before multiplying.

Step 3: Add the Partial Products

You now have two rows of numbers. These are called partial products.
The final step is to add these two rows together to get your grand total!

Explain the final step: adding the two partial products together to get the final answer.

Let's Practice Together: Example 1

Problem: 23 x 14

Follow the steps we just learned!

Lead students through a complete example, step-by-step. Ask them to predict the next step or solution.

Another One: Example 2

Problem: 35 x 21

You got this!

Lead students through another complete example. Encourage them to try on whiteboards or scratch paper first.

Your Turn! Independent Practice

Now it's time to show what you know!
You'll get a worksheet with more problems to practice multidigit multiplication.
Work carefully and remember your steps!

Introduce the independent practice. Explain the worksheet and expectations. Reiterate that they can ask for help.

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Worksheet

Multidigit Multiplication Review

Instructions: Solve each multiplication problem below. Show your work clearly in the space provided. Remember to use all the steps we learned!

Problem 1

21 x 13













Problem 2

34 x 22













Problem 3

45 x 16













Problem 4

52 x 23













Challenge Problem

123 x 12













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