## Key Concepts

- Addends and sums.
- Use the addition fact patterns to find the sum.

## Introduction

### Addends

Addends are any of the numbers that are added together. For example: In the addition equation 8 + 3 = 11, the 8 and the 3 are addends.

**Addition:**

**Example 1:**

Find the addends and sum for the equation given below.

3 + 4 = 7

**Solution: **

3 and 4 are addends.

7 is the sum.

**Example 2:**

Find the addends and sum for the equation given below.

9 + 5 = 14

**Solution:**

9 and 5 are addends.

14 is the sum.

### Use the addition fact patterns to find the sum

**Example 3:**

Find all the ways to make a sum of 5. Identify the pattern it makes.

**Example 4:**

Find all the ways to make a sum of 9. Identify the pattern it makes.

**Example 5:**

Use fact patterns and complete the equation.

10 + ____ = 16

9 + 7 = ____

____ + 8 = 16

7 + ____ = 16

6 + ____ = 16

**Solution:**

## Exercise

1.____________ are any of the numbers that are added together?

2. Find the addends and sum for the equation given below.

2 + 1 = 3

3. Find the addends and sum for the equation given below.

4+ 6 = 10

4. Find the addends and sum for the equation given below.

9+ 8 = 17

5. Find all the ways to make a sum of 3. Identify the pattern it makes.

6. Find all the ways to make a sum of 4. Identify the pattern it makes.

7. Find all the ways to make a sum of 7. Identify the pattern it makes.

8. Use fact patterns and complete the equation.

3+____ = 7

4 + 3 = _____

____ +2 = 7

6 + ____ = 7

7 + ____ = 7

9. Use fact patterns and complete the equation.

10 + ____ = 14

9 + 5 = ____

_____ + 6 = 14

7 +____ = 14

6 +____ = 14

10. Use fact patterns and complete the equation.

9 + ____ = 9

8 + 1 = ____

____ + = 9

6 + ___ = 9

### Concept Map

### What have we learned

- Identify addends and sums in an addition equation.
- Use the addition fact patterns to find the sum.

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