Fact Family Worksheets for First Grade | Activity Shelter - Free Printable

Problem Explanation:

The task involves completing "fact families" for given sets of numbers. A fact family is a group of math facts using the same numbers, typically involving addition and subtraction (or multiplication and division). For example, if you have the numbers 3, 5, and 8, the fact family would include:

- Addition: \(3 + 5 = 8\) and \(5 + 3 = 8\)
- Subtraction: \(8 - 3 = 5\) and \(8 - 5 = 3\)

We need to complete the fact families for each set of numbers provided in the image.

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Given Sets of Numbers:

1. 3, 5, 8
2. 5, 5, 10
3. 7, 2, 9
4. 4, 3, 7

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Solution:

#### Set 1: 3, 5, 8
- Addition:
- \(3 + 5 = 8\)
- \(5 + 3 = 8\)
- Subtraction:
- \(8 - 3 = 5\)
- \(8 - 5 = 3\)

#### Set 2: 5, 5, 10
- Addition:
- \(5 + 5 = 10\)
- (Since both numbers are the same, there is no other addition fact.)
- Subtraction:
- \(10 - 5 = 5\)
- (Since both numbers are the same, there is no other subtraction fact.)

#### Set 3: 7, 2, 9
- Addition:
- \(7 + 2 = 9\)
- \(2 + 7 = 9\)
- Subtraction:
- \(9 - 7 = 2\)
- \(9 - 2 = 7\)

#### Set 4: 4, 3, 7
- Addition:
- \(4 + 3 = 7\)
- \(3 + 4 = 7\)
- Subtraction:
- \(7 - 4 = 3\)
- \(7 - 3 = 4\)

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Final Answer:

\[
\boxed{
\begin{array}{ll}
\text{3, 5, 8:} & \begin{aligned}
& 3 + 5 = 8 \\
& 5 + 3 = 8 \\
& 8 - 3 = 5 \\
& 8 - 5 = 3
\end{aligned} \\
\text{5, 5, 10:} & \begin{aligned}
& 5 + 5 = 10 \\
& 10 - 5 = 5
\end{aligned} \\
\text{7, 2, 9:} & \begin{aligned}
& 7 + 2 = 9 \\
& 2 + 7 = 9 \\
& 9 - 7 = 2 \\
& 9 - 2 = 7
\end{aligned} \\
\text{4, 3, 7:} & \begin{aligned}
& 4 + 3 = 7 \\
& 3 + 4 = 7 \\
& 7 - 4 = 3 \\
& 7 - 3 = 4
\end{aligned}
\end{array}
}
\]