Day 1 Warm-Up: More or Less? (OA.1)

Directions: Look at each pair of numbers. Write how many more or how many less there are.

1. 5 and 3
   There are ______ more. / There are ______ less.
   
   
   
   

2. 7 and 10
   There are ______ more. / There are ______ less.
   
   
   
   

3. 8 and 4
   There are ______ more. / There are ______ less.
   
   
   
   

4. 6 and 6
   There are ______ more. / There are ______ less.
   
   
   
   

5. 1 and 9
   There are ______ more. / There are ______ less.
   
   
   
   

Day 1: Adding Three Numbers with Manipulatives

Materials: A bag of mixed manipulatives (e.g., counting bears, unifix cubes, pom-poms) for each group.

Directions: Work with your group. For each problem, grab the correct number of manipulatives, combine them, and find the total. Then, write your answer below.

1. Problem: 4 red cubes, 2 blue cubes, 3 yellow cubes.
   How many cubes are there in all?
   
   
   
   

2. Problem: 5 small buttons, 1 medium button, 6 large buttons.
   How many buttons are there in all?
   
   
   
   

3. Problem: 3 green bears, 3 orange bears, 3 purple bears.
   How many bears are there in all?
   
   
   
   

4. Problem: Make your own! Grab three different groups of manipulatives. Count them. Add them together.
   Write down your problem and your answer!
   
   
   
   
   
   
   

Day 1 Worksheet: Three Number Sums

Directions: Add the three numbers. You can draw pictures or use your manipulatives to help you!

1. 4 + 1 + 5 = _____
   
   
   
   

2. 2 + 6 + 3 = _____
   
   
   
   

3. 7 + 0 + 2 = _____
   
   
   
   

4. 1 + 8 + 1 = _____
   
   
   
   

5. 3 + 3 + 5 = _____
   
   
   
   

6. Challenge! Sarah has 3 blue flowers, 2 red flowers, and 4 yellow flowers. How many flowers does she have in all?
   Show your work:
   
   
   
   
   
   
   
   Answer: _____

Day 1 Answer Key

Day 1 Warm-Up: More or Less? (OA.1) Answers

Directions: Look at each pair of numbers. Write how many more or how many less there are.

1. 5 and 3

   • Thought Process: To find the difference between 5 and 3, subtract the smaller number from the larger number: 5 - 3 = 2. Since 5 is larger than 3, there are 2 more. Alternatively, 3 is smaller than 5, so there are 2 less.
   • Answer: There are 2 more. / There are 2 less.

2. 7 and 10

   • Thought Process: To find the difference between 10 and 7, subtract: 10 - 7 = 3. Since 10 is larger than 7, there are 3 more. Alternatively, 7 is smaller than 10, so there are 3 less.
   • Answer: There are 3 more. / There are 3 less.

3. 8 and 4

   • Thought Process: To find the difference between 8 and 4, subtract: 8 - 4 = 4. Since 8 is larger than 4, there are 4 more. Alternatively, 4 is smaller than 8, so there are 4 less.
   • Answer: There are 4 more. / There are 4 less.

4. 6 and 6

   • Thought Process: When two numbers are the same, their difference is zero. There are no more and no less.
   • Answer: There are 0 more. / There are 0 less.

5. 1 and 9

   • Thought Process: To find the difference between 9 and 1, subtract: 9 - 1 = 8. Since 9 is larger than 1, there are 8 more. Alternatively, 1 is smaller than 9, so there are 8 less.
   • Answer: There are 8 more. / There are 8 less.

Day 1 Worksheet: Three Number Sums Answers

Directions: Add the three numbers.

1. 4 + 1 + 5 = 10

   • Thought Process: 4 + 1 = 5. Then 5 + 5 = 10.

2. 2 + 6 + 3 = 11

   • Thought Process: 2 + 6 = 8. Then 8 + 3 = 11.

3. 7 + 0 + 2 = 9

   • Thought Process: 7 + 0 = 7. Then 7 + 2 = 9.

4. 1 + 8 + 1 = 10

   • Thought Process: 1 + 8 = 9. Then 9 + 1 = 10.

5. 3 + 3 + 5 = 11

   • Thought Process: 3 + 3 = 6. Then 6 + 5 = 11.

6. Challenge! Sarah has 3 blue flowers, 2 red flowers, and 4 yellow flowers. How many flowers does she have in all?

   • Thought Process: Add the number of each color of flower: 3 + 2 + 4. First, 3 + 2 = 5. Then, 5 + 4 = 9.
   • Answer: 9 flowers

Day 1 Script: Number Ninjas - Adding Three Numbers

Warm-Up: More or Less? (OA.1 Review) (5 minutes)

Teacher: "Good morning, Number Ninjas! Let's get our math brains warmed up. I'm handing out a quick warm-up worksheet called Day 1 Warm-Up: More or Less? (OA.1). For each problem, I want you to figure out how many more or how many less there are between the two numbers. Take about 5 minutes to complete this on your own. When you're done, we'll quickly go over the answers."

(Distribute warm-up worksheets. Circulate to ensure students understand the task.)

Teacher: "Alright, pencils down! Let's quickly review. For number 1, '5 and 3', how many more or less?"
(Call on a student for the answer, and briefly discuss the strategy. Repeat for a few more problems or quickly share answers.)

Introduction to Adding Three Numbers (OA.2) - I Do (5 minutes)

Teacher: "Fantastic job with our warm-up! Today, we're going on an exciting new adventure: adding three numbers together! It's like finding three groups of friends and seeing how many we have in total. Instead of just two numbers, we'll be combining three. Don't worry, it's super fun!"

"Look up at the board at our Day 1 Slide Deck. I'm going to show you how I add three numbers using our counting tools, called manipulatives. Watch closely as I show you how to combine three groups of objects. You can have your own manipulatives out, but right now, just watch and listen to my thinking."

(Teacher displays an example on the board, e.g., 3 red cubes, 2 blue cubes, 4 yellow cubes.)

Teacher: "I have 3 red cubes, 2 blue cubes, and 4 yellow cubes. My goal is to find out how many I have altogether. First, I'll take my 3 red cubes and my 2 blue cubes and put them together. 3 plus 2 equals... 5! So, now I have 5 cubes."

"Now, I need to add my third group, the 4 yellow cubes. I had 5, and I'm adding 4 more. 5... 6, 7, 8, 9! So, 5 plus 4 equals 9. That means 3 + 2 + 4 = 9! I found the total by adding two numbers first, and then adding the third to that sum. See? It's just like what we already know, but with one more step."

Guided Practice: Adding Three Numbers (OA.2) - We Do (10 minutes)

Teacher: "Now that you've seen how I do it, let's try some together! This is the 'We Do' part. I'll give you a problem, and we'll use our manipulatives to solve it. Get your manipulatives ready!"

(Display the next slides of the Day 1 Slide Deck with practice problems.)

Teacher: "Our first 'We Do' problem is: You have 5 blue beads, 1 purple bead, and 3 pink beads. How many beads do you have in all?"

"What strategies can we use to make sure we add all three numbers correctly? Who can tell me a good first step?" (Wait for responses, guiding them to add two numbers first.)

Teacher: "Great idea! Let's add the 5 blue beads and the 1 purple bead first. Everyone, put 5 manipulatives and 1 manipulative together. How many do you have?" (Wait for responses, confirm 6.)

Teacher: "Excellent! Now, we have 6. What's our next step? Yes, we add the 3 pink beads! So, 6 plus 3 more. Count them out. What do we get?" (Wait for responses, confirm 9.)

Teacher: "Fantastic! So, 5 + 1 + 3 = 9. You just added three numbers!"

(Repeat with another example, like the blocks problem on the slide. Encourage students to explain their steps.)

Teacher: "For our next problem: There are 4 big blocks, 2 medium blocks, and 5 small blocks. How many blocks are there altogether? Turn to your partner and quickly tell them how you would start this problem. Then, use your manipulatives to find the total."

(Allow students a moment to discuss and work with manipulatives. Call on a pair or individual to share their process and answer.)

Small Group/Independent Practice: Manipulatives Activity & Worksheet (You Do) (30 minutes)

Teacher: "You are doing an amazing job with adding three numbers! Now it's your turn to be the Number Ninjas all on your own. This is the 'You Do' part!"

"You will first work on the Day 1 Manipulatives Activity with your group. After you complete the activity, you will work on the Day 1 Worksheet: Three Number Sums by yourself. Remember to use your manipulatives if you need help on the worksheet, and make sure to show your work or draw pictures if that helps you solve the problems! I will be walking around to help anyone who needs it."

(Distribute the activity and worksheet. Circulate among students, providing individualized support, checking for understanding, and asking questions like, 'Which two numbers did you add first? How did that help you?')

Teacher: "Alright, Number Ninjas, we have about 5 more minutes. Please try to finish the problem you are on, and then start to put away your manipulatives. We will collect the worksheets before we transition to our next subject."

(Collect worksheets as students finish.)

Teacher: "You all did a wonderful job today exploring how to add three numbers using your manipulatives! Give yourselves a silent cheer!"

Day 2 Warm-Up: Manipulative Review (OA.2)

Directions: Imagine you have manipulatives (like cubes or counters). Solve these problems by adding the three numbers, just like we did yesterday!

1. You have 2 red cubes, 3 blue cubes, and 4 yellow cubes. How many cubes in all?
   
   
   
   

2. There are 5 small rocks, 1 medium rock, and 2 large rocks. How many rocks altogether?
   
   
   
   

3. Maria picked 3 green leaves, 2 brown leaves, and 5 red leaves. How many leaves did she pick?
   
   
   
   

Day 2: Number Line Leaps - Adding Three Numbers

Materials: Individual number lines (0-20) for each student or group.

Directions: Work with your group. For each problem, use your number line to find the sum of the three numbers. Draw your hops on the number line provided or on your own paper to show your work!

1. Problem: 4 + 3 + 2 = ?
   Draw your hops on the number line below:
   
   ------------------------------------------------------------------------------------------------------
   
   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
   
   
   
   Answer: ______
   
   
   
   

2. Problem: 1 + 5 + 4 = ?
   Draw your hops on the number line below:
   
   ------------------------------------------------------------------------------------------------------
   
   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
   
   
   
   Answer: ______
   
   
   
   

3. Problem: 6 + 1 + 3 = ?
   Draw your hops on the number line below:
   
   ------------------------------------------------------------------------------------------------------
   
   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
   
   
   
   Answer: ______
   
   
   
   

4. Problem: Choose your own three numbers (that add up to 20 or less!). Write your problem, then use the number line to solve it. Draw your hops!
   
   Problem: ______ + ______ + ______ = ?
   Draw your hops on the number line below:
   
   ------------------------------------------------------------------------------------------------------
   
   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
   
   
   
   Answer: ______
   
   
   
   

Day 2 Worksheet: Number Line Adding

Directions: Use the number line to help you add the three numbers. Draw your hops above the number line to show your work!

1. 3 + 2 + 5 = _____
   
   ------------------------------------------------------------------------------------------------------
   
   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
   
   
   
   

2. 1 + 6 + 3 = _____
   
   ------------------------------------------------------------------------------------------------------
   
   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
   
   
   
   

3. 5 + 0 + 4 = _____
   
   ------------------------------------------------------------------------------------------------------
   
   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
   
   
   
   

4. 2 + 4 + 4 = _____
   
   ------------------------------------------------------------------------------------------------------
   
   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
   
   
   
   

5. Story Problem: Tom saw 3 bluebirds, 2 robins, and 5 sparrows in his backyard. How many birds did he see in all? Use the number line to solve.
   
   ------------------------------------------------------------------------------------------------------
   
   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
   
   
   
   
   Answer: _____ birds

Day 2 Answer Key

Day 2 Warm-Up: Manipulative Review (OA.2) Answers

Directions: Imagine you have manipulatives (like cubes or counters). Solve these problems by adding the three numbers, just like we did yesterday!

1. You have 2 red cubes, 3 blue cubes, and 4 yellow cubes. How many cubes in all?

   • Thought Process: First, add two numbers: 2 + 3 = 5. Then add the third number to the sum: 5 + 4 = 9.
   • Answer: 9 cubes

2. There are 5 small rocks, 1 medium rock, and 2 large rocks. How many rocks altogether?

   • Thought Process: First, add two numbers: 5 + 1 = 6. Then add the third number to the sum: 6 + 2 = 8.
   • Answer: 8 rocks

3. Maria picked 3 green leaves, 2 brown leaves, and 5 red leaves. How many leaves did she pick?

   • Thought Process: First, add two numbers: 3 + 2 = 5. Then add the third number to the sum: 5 + 5 = 10.
   • Answer: 10 leaves

Day 2 Worksheet: Number Line Adding Answers

Directions: Use the number line to help you add the three numbers. Draw your hops above the number line to show your work!

1. 3 + 2 + 5 = 10

   • Thought Process: Start at 3, hop 2 to 5, then hop 5 more to 10.
     
     -----2----5-----5----->
     
     0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
     
     
     
     

2. 1 + 6 + 3 = 10

   • Thought Process: Start at 1, hop 6 to 7, then hop 3 more to 10.
     
     -1----6----3--------->
     
     0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
     
     
     
     

3. 5 + 0 + 4 = 9

   • Thought Process: Start at 5, hop 0 (stay at 5), then hop 4 more to 9.
     
     -----5--0--4----------->
     
     0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
     
     
     
     

4. 2 + 4 + 4 = 10

   • Thought Process: Start at 2, hop 4 to 6, then hop 4 more to 10.
     
     --2-----4------4----->
     
     0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
     
     
     
     

5. Story Problem: Tom saw 3 bluebirds, 2 robins, and 5 sparrows in his backyard. How many birds did he see in all? Use the number line to solve.

   • Thought Process: Add 3 + 2 + 5. Start at 3, hop 2 to 5, then hop 5 more to 10.
     
     -----3----2----5----->
     
     0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
     
     
     
     
   • Answer: 10 birds

Day 2 Script: Number Line Leaps - Adding Three Numbers

Warm-Up: Manipulative Review (OA.2) (5 minutes)

Teacher: "Good morning, Super Sorters! Let's start our day by quickly reviewing what we learned yesterday about adding three numbers. I'm handing out a warm-up called Day 2 Warm-Up: Manipulative Review (OA.2). For these problems, I want you to imagine using your manipulatives, or if you prefer, you can use them quietly on your desk to help you add the three numbers. Take about 5 minutes to complete this."

(Distribute warm-up worksheets. Circulate to ensure students understand the task.)

Teacher: "Alright, let's review our warm-up answers. For number 1, '2 red cubes, 3 blue cubes, and 4 yellow cubes', how many cubes in all?" (Call on a student for the answer, and briefly discuss the strategy: 2+3=5, then 5+4=9. Repeat for the other problems.)

Introduction to Adding Three Numbers with a Number Line (OA.2) - I Do (5 minutes)

Teacher: "Excellent job recalling our three-number addition! Yesterday, we were Number Ninjas using manipulatives. Today, we're going to learn an exciting new super helpful tool to add three numbers: the number line! It's like a number road that helps us hop and skip to our answer, and it can be really fast once we get the hang of it."

"Look up at the board at our Day 2 Slide Deck. I'm going to show you how I use a number line to add three numbers. Watch carefully as I make my hops. You can pretend to hop on your desk or on your own number line if you have one out, but mostly I want you to watch my steps and listen to my thinking."

(Teacher displays an example on the board, e.g., 3 + 2 + 4, and uses a large number line or draws one.)

Teacher: "Let's try to add 3 + 2 + 4. My first number is 3, so I will start by putting my finger (or marker) on the number 3 on the number line. Now, I need to add 2. Adding means hopping forward! So, from 3, I'm going to make 2 hops forward: one hop to 4, and another hop to 5. Now I'm at 5!"

"But wait, I have a third number to add: 4! So, from 5, I need to make 4 more hops forward. Let's count them: one hop to 6, two hops to 7, three hops to 8, and four hops to 9! Wow! I landed on 9. So, 3 + 2 + 4 = 9! I used the number line to make hops for each number I was adding."

Guided Practice: Adding Three Numbers with a Number Line (OA.2) - We Do (10 minutes)

Teacher: "Ready to leap into action together? This is our 'We Do' part! We'll try some problems using the number line together. You can use a number line I've provided, or if you have your own, get it ready!"

(Display the next slides of the Day 2 Slide Deck with practice problems.)

Teacher: "Our first 'We Do' problem is: 2 + 3 + 5 = ?"

"What do we do first when we add on a number line? Where should we start?" (Wait for responses, guiding them to start at 2.)

Teacher: "Excellent! Everyone put your finger on 2. Now, how many hops do we make for the next number, which is 3?" (Wait for responses, confirm 3 hops.)

Teacher: "Make those 3 hops from 2. Where did you land?" (Confirm 5.)

Teacher: "Fantastic! We're at 5. Now, what's our third number? Yes, it's 5! So, from 5, how many more hops do we make?" (Confirm 5 hops.)

Teacher: "Make those 5 hops from 5. Where did you land now?" (Confirm 10.)

Teacher: "You got it! So, 2 + 3 + 5 = 10! You just added three numbers using the number line!"

(Repeat with another example, like 1 + 6 + 2, on the slide. Encourage students to explain their hopping steps.)

Teacher: "For our next problem: 1 + 6 + 2 = ? Turn to your partner and quickly tell them where you would start and how many hops you would make first. Then, use your number line to find the total."

(Allow students a moment to discuss and work with their number lines. Call on a pair or individual to share their process and answer.)

Small Group/Independent Practice: Number Line Activity & Worksheet (You Do) (30 minutes)

Teacher: "You are becoming amazing Number Line Leapers! Now it's your turn to be the math detectives all on your own. This is the 'You Do' part!"

"You will first work on the Day 2 Number Line Activity with your group. This activity has number lines for you to draw your hops directly on! After you complete the activity, you will work on the Day 2 Worksheet: Number Line Adding by yourself. Remember to show your hops on the number line for each problem! I will be walking around to help anyone who needs it."

(Distribute the activity and worksheet. Circulate among students, providing individualized support, checking for understanding, and asking questions like, 'Which number did you start at? How many hops did you make for the second number?')

Teacher: "Alright, Super Sorters, we have about 5 more minutes. Please try to finish the problem you are on, and then gather your materials. We will collect the worksheets before we transition to our next subject."

(Collect worksheets as students finish.)

Teacher: "You all did a wonderful job today learning to add three numbers using a number line! Give yourselves a round of applause!"