📚 Topic Summary
Decomposing and composing the number 10 means finding different ways to make 10 using two or more smaller numbers. Think of it like having 10 building blocks and figuring out how many different towers you can build using those blocks. For example, you can make 10 by adding 5 + 5, or 6 + 4, or even 1 + 9! It's all about understanding that numbers can be broken apart (decomposed) and put back together (composed) in different ways to reach the same total.
🧮 Part A: Vocabulary
Match the word with its meaning:
| Word |
Meaning |
| 1. Compose |
A. To take apart into smaller pieces |
| 2. Decompose |
B. The total amount |
| 3. Sum |
C. Putting numbers together to find the total |
| 4. Number Bond |
D. A math tool showing how numbers join |
| 5. Total |
E. The final number |
✍️ Part B: Fill in the Blanks
Read the sentences and fill in the missing words.
When we _______ numbers, we break them into smaller parts. When we _______ numbers, we put them together to make a bigger number. $6 + 4 = ____$. The _______ is 10. A _______ shows how numbers can be split into parts.
🤔 Part C: Critical Thinking
Imagine you have 10 cookies. How many ways can you share them with a friend? Show two different ways with drawings or numbers!