Making a ten to add examples with solutions

🔢 Quick Study Guide

• ➕ Making a Ten: This strategy involves breaking down numbers to create a group of ten, simplifying addition.
• ➗ Decomposition: Break one number into two parts so that one part can combine with the other addend to make ten.
• 💡 Example: To solve $8 + 5$, break $5$ into $2 + 3$. Add $2$ to $8$ to make $10$, then add the remaining $3$ to get $13$.
• 📝 Formula: $a + b = a + (10 - a) + (b - (10 - a))$
• ➕ Benefits: Easier mental math, faster calculations, and a stronger number sense.

Practice Quiz

1. What is the first step in 'making a ten' to solve $9 + 6$?
1. Adding $9$ and $6$ directly.
2. Breaking $6$ into $1 + 5$.
3. Breaking $9$ into $4 + 5$.
4. Subtracting $6$ from $9$.
2. Using 'making a ten', how would you rewrite $7 + 5$?
1. $7 + (3 + 2)$
2. $5 + (5 + 2)$
3. $7 + (5 + 5)$
4. $7 + (7 + 5)$
3. Solve $8 + 4$ using the 'making a ten' strategy. What is the final answer?
1. $10$
2. $11$
3. $12$
4. $13$
4. Which number should you break apart when solving $6 + 7$ using 'making a ten'?
1. $6$
2. $7$
3. Either $6$ or $7$
4. Neither $6$ nor $7$
5. What is $5 + 8$ when solved using 'making a ten'?
1. $12$
2. $13$
3. $14$
4. $15$
6. How does 'making a ten' simplify addition?
1. By always adding $5$.
2. By creating a group of $10$.
3. By subtracting numbers.
4. By multiplying numbers.
7. Using 'making a ten', what is the missing number: $4 + 9 = 4 + (6 + ?)$
1. $1$
2. $2$
3. $3$
4. $4$