Math worksheet answer key for basic addition and subtraction exercises.

The image you uploaded appears to be a math worksheet focused on "Fact Families" for addition and subtraction. A fact family is a group of related addition and subtraction facts that use the same numbers. For example, the numbers 3, 4, and 7 can form the following fact family:

- Addition: \(3 + 4 = 7\) and \(4 + 3 = 7\)
- Subtraction: \(7 - 3 = 4\) and \(7 - 4 = 3\)

Worksheet Analysis

The worksheet contains multiple rows of problems, each involving three numbers that form a fact family. The task is to fill in the missing numbers or operations (addition or subtraction) to complete the equations.

Solution Approach

1. Identify the Numbers in Each Fact Family: Each row contains three numbers that are part of a fact family.
2. Use Addition and Subtraction Relationships:
- If two numbers are added, their sum should match the third number.
- If one number is subtracted from another, the result should match the third number.
3. Fill in the Missing Values: Use the relationships between the numbers to determine the correct values or operations.

Step-by-Step Solution

#### Row 1:
Numbers: 4, 1, 3
Fact Family:
- \(4 - 1 = 3\)
- \(4 - 3 = 1\)
- \(1 + 3 = 4\)
- \(3 + 1 = 4\)

#### Row 2:
Numbers: 2, 1, 3
Fact Family:
- \(2 + 1 = 3\)
- \(1 + 2 = 3\)
- \(3 - 1 = 2\)
- \(3 - 2 = 1\)

#### Row 3:
Numbers: 3, 2, 5
Fact Family:
- \(3 + 2 = 5\)
- \(