Single Digit Addition – missing addend – no regrouping

What is a Missing Addend?

A missing addend is the number you need to add to another number to get a total.

For example:

  • 4 + ___ = 9

To solve this, we need to find what number goes in the blank. When solving without regrouping, all the numbers stay in their place values—no carrying over tens or ones!

Steps to Find the Missing Addend Without Regrouping

Here’s the simple formula:

Missing Addend = Total Sum – Known Addend

And remember: no regrouping means the numbers are small and easy to subtract!

Example 1: No Regrouping

Problem:

Find the missing addend in 3 + ___ = 8.

Solution:

  1. Start with the total sum: 8.
  2. Subtract the known number: 8 – 3 = 5.
  3. The missing addend is 5.

Example 2: Fun with Apples!

Problem:

Lila picked 7 apples, but her basket holds 12 apples. How many apples does she still need to fill the basket?

Solution:

  1. Total apples: 12.
  2. Apples picked: 7.
  3. Subtract: 12 – 7 = 5.
  4. Answer: Lila needs 5 more apples to fill the basket!

Practice Time

Try solving these missing addend problems without regrouping:

1) Find the missing addend:

1
+
2

2) Find the missing addend:

4
+
9

3) Find the missing addend:

+ 0
9

4) Find the missing addend:

9
+
0

5) Find the missing addend:

7
+
8

6) Find the missing addend:

+ 0
4

7) Find the missing addend:

+ 4
7

8) Find the missing addend:

3
+
5

9) Find the missing addend:

3
+
6

10) Find the missing addend:

1
+
6

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