Easy method to add 2-digit and 1-digit numbers by 'making a ten' (Grade 2)

➕ [Addition Emoji] Understanding 'Making a Ten'

The 'Making a Ten' strategy is a simple and effective way to add a 2-digit number and a 1-digit number. It involves breaking down the 1-digit number to create a ten with the 2-digit number. This simplifies the addition process, making it easier to perform mentally.

📜 [Scroll Emoji] History and Background

While the exact origin is hard to pinpoint, the concept of breaking down numbers to simplify addition has been used in various forms for centuries. The modern 'Making a Ten' strategy is a refinement of these techniques, tailored for young learners. It aligns with the principles of number sense and place value, which are crucial for building a strong foundation in mathematics.

🔑 [Key Emoji] Key Principles

• 🎯 [Target Emoji] Identify the Target: Determine how much the 2-digit number needs to reach the next ten.
• 🧱 [Brick Emoji] Break Down the 1-Digit Number: Split the 1-digit number into two parts: one that completes the ten and one that is left over.
• 🤝 [Handshake Emoji] Make a Ten: Combine the part of the 1-digit number with the 2-digit number to create a ten.
• ➕ [Plus Emoji] Add the Remainder: Add the remaining part of the 1-digit number to the ten.

💡 [Lightbulb Emoji] Step-by-Step Guide

1. Step 1: Let's say we want to add $17 + 5$.
2. Step 2: How much does 17 need to reach 20? It needs 3.
3. Step 3: Break down 5 into $3 + 2$.
4. Step 4: Add 3 to 17 to make 20.
5. Step 5: Now add the remaining 2 to 20: $20 + 2 = 22$. So, $17 + 5 = 22$.

➕ [Math Emoji] Real-World Examples

• 🍎 [Apple Emoji] Example 1: You have 26 apples and your friend gives you 8 more. How many apples do you have in total? $26 + 8$. 26 needs 4 to reach 30. Break down 8 into $4 + 4$. $26 + 4 = 30$. Then, $30 + 4 = 34$. You have 34 apples.
• ⚽ [Soccer Emoji] Example 2: A soccer team scored 18 goals in the first half and 6 goals in the second half. How many goals did they score in total? $18 + 6$. 18 needs 2 to reach 20. Break down 6 into $2 + 4$. $18 + 2 = 20$. Then, $20 + 4 = 24$. They scored 24 goals.
• 🎈 [Balloon Emoji] Example 3: You have 39 balloons and you buy 7 more. How many balloons do you have in total? $39 + 7$. 39 needs 1 to reach 40. Break down 7 into $1 + 6$. $39 + 1 = 40$. Then, $40 + 6 = 46$. You have 46 balloons.

✍️ [Pencil Emoji] Practice Quiz

1. $28 + 5 =$ ?
2. $16 + 7 =$ ?
3. $37 + 4 =$ ?
4. $45 + 6 =$ ?
5. $59 + 3 =$ ?
6. $64 + 8 =$ ?
7. $73 + 9 =$ ?

Answers: 1) 33, 2) 23, 3) 41, 4) 51, 5) 62, 6) 72, 7) 82

🧠 [Brain Emoji] Benefits of the 'Making a Ten' Strategy

• ➕ [Plus Emoji] Makes addition easier and faster.
• 🧱 [Brick Emoji] Reinforces understanding of place value.
• ➗ [Divide Emoji] Builds a strong foundation for more complex math problems.
• 💡 [Lightbulb Emoji] Promotes mental math skills.

🏁 [Checkered Flag Emoji] Conclusion

The 'Making a Ten' strategy is a valuable tool for young learners to master addition. By breaking down numbers and creating tens, students can simplify the addition process and build a strong foundation in math. Keep practicing and you'll become a math whiz in no time!