subtraction strategies within 20 examples

📚 Quick Study Guide

🔢 Counting Back: Start with the larger number and count backwards the number you are subtracting. For example, for $12 - 5$, start at 12 and count back 5: 11, 10, 9, 8, 7. So, $12 - 5 = 7$. 💡 Using a Number Line: Visualize subtraction by moving left on a number line. If you have $15 - 8$, find 15 on the number line and move 8 spaces to the left. You'll land on 7. ➖ Breaking Apart Numbers: Break down the number you are subtracting into smaller, more manageable parts. For instance, with $18 - 9$, you could subtract 8 first ($18 - 8 = 10$) and then subtract 1 ($10 - 1 = 9$). 🖐️ Using Fingers: Great for smaller numbers! If you have $9 - 4$, hold up 9 fingers and then put down 4. You'll have 5 fingers remaining. 🧠 Memorization: Practice subtraction facts until they become automatic. Flashcards and games can help!

📝 Practice Quiz

1. What is $14 - 6$?
1. 6
2. 7
3. 8
4. 9
2. Calculate: $19 - 5 = ?$
1. 12
2. 13
3. 14
4. 15
3. Solve: $11 - 3 = ?$
1. 6
2. 7
3. 8
4. 9
4. What is $16 - 8$?
1. 6
2. 7
3. 8
4. 9
5. Find the answer: $20 - 7 = ?$
1. 11
2. 12
3. 13
4. 14
6. Subtract: $13 - 4 = ?$
1. 7
2. 8
3. 9
4. 10
7. What is $17 - 9$?
1. 6
2. 7
3. 8
4. 9