Assessment Questions for Composing and Decomposing Numbers K

🔢 Quick Study Guide

• 🧩 Understanding Composing: ➕ Composing numbers means putting them together to make a larger number. Think of it like building with blocks!
• 🧱 Understanding Decomposing: ➖ Decomposing numbers means breaking them down into smaller numbers. It's like taking apart that block tower!
• 💡 Key Idea: A number can be composed and decomposed in many different ways! For example, 5 can be 2 + 3 or 1 + 4.
• 🧮 Number Bonds: Use number bonds to visualize how numbers can be broken apart and put together.
• ✏️ Practice: The more you practice, the better you'll get at recognizing different ways to compose and decompose numbers.

➕ Practice Quiz

1. Which of the following shows how to compose the number 7?

   1. 3 + 3
   2. 2 + 4
   3. 1 + 5
   4. 4 + 3

2. Which equation shows a way to decompose the number 10?

   1. 6 + 3 = 10
   2. 5 + 6 = 10
   3. 5 + 5 = 10
   4. 4 + 4 = 10

3. What two numbers can be added together to make 6?

   1. 1 + 6
   2. 2 + 2
   3. 3 + 4
   4. 4 + 2

4. Which of the following is NOT a way to decompose the number 4?

   1. 2 + 2
   2. 3 + 1
   3. 4 + 0
   4. 1 + 1

5. If you have 8, and you take away 3, what two numbers show this decomposition?

   1. 8 - 2
   2. 8 - 3
   3. 5 + 2
   4. 6 + 1

6. Which of these number sentences shows how to make 9?

   1. 3 + 5 = 9
   2. 2 + 6 = 9
   3. 4 + 4 = 9
   4. 5 + 4 = 9

7. What is a missing number to compose 12? 6 + ? = 12

   1. 4
   2. 5
   3. 6
   4. 7