Single-Digit Addition with Missing Addends (Regrouping) – quiz

Learning how to find missing numbers in addition can be like solving a fun puzzle! Sometimes, these puzzles need a little extra help called regrouping. Let’s dive into what regrouping means and how we can solve these types of problems.

✨ What is a Missing Addend?

In addition, a missing addend is a number that you need to find to make the equation correct. For example:

3 + ___ = 9

In this equation, we need to find the number that, when added to 3, gives us 9.

🧠 How Do We Solve Missing Addend Problems?

To solve a missing addend problem, you can think about it like this:

1. Start with the total (the number after the equals sign).
2. Subtract the number you know from the total to find the missing number.

Let’s try solving 3 + ___ = 9:

• Start with 9.
• Subtract 3:
  9−3=6

So, the missing addend is 6.
✅ 3 + 6 = 9

🔄 What is Regrouping in Addition?

Sometimes, when you add numbers, the sum is greater than 9, and you need to regroup. Regrouping is when you carry over a value to the next place value (like tens or hundreds).

For example, let’s solve:
7 + ___ = 14

We know that 7 plus something equals 14. Let’s find that missing addend.

💡 Step-by-Step Solution

1. Start with the total: 14.
2. Subtract the number you know:
   14−7=7

So, the missing addend is 7.
✅ 7 + 7 = 14

This addition involved regrouping because 7 + 7 makes 14, which is a two-digit number. We need to carry over the 1 to the tens place.

📝 Practice Problems

1) Find the missing addend:

2) Find the missing addend:

3) Find the missing addend:

4) Find the missing addend:

5) Find the missing addend:

6) Find the missing addend:

7) Find the missing addend:

8) Find the missing addend:

9) Find the missing addend:

10) Find the missing addend:

Answers:
1) 1
2) 9
3) 1
4) 9
5) 8
6) 3
7) 5
8) 6
9) 9
10) 8