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Math Worksheets

Lessons for Second Grade

Free Printable Worksheets

Printable “Fact Families” Worksheets:

Fact Family 10 (Add & Subtract) (eg. 10 - 4)

Fact Family Triangle (addition, subtraction)

Fact Family within 20 (eg. 15 - 8)

A fact family consists of a set of related addition and subtraction facts that involve the same set of numbers. For example, in the fact family within 20, you’ll have a group of equations where the numbers are within the range of 0 to 20.

- A fact family consists of four related equations – two addition and two subtraction – using the same set of numbers.

Example:

5+7=12

7+5=12

12−5=7

12-7=5 - In a fact family, the numbers are related, and they appear in both addition and subtraction equations.
- Addition and subtraction are inverse operations. Knowing one fact allows you to find the related fact by using the inverse operation.
- Number bonds can be used to visually represent the fact family. Place the three numbers in a circle, connecting them with lines to show their relationships.

By practicing fact families within 20, students not only reinforce their addition and subtraction skills but also deepen their understanding of the relationships between numbers. This concept is foundational for building mathematical fluency and problem-solving skills.

Have a look at this video if you need to revise fact families within 20.

Click on the following worksheet to get a printable pdf document.

Scroll down the page for more **Fact Family within 20 Worksheets**.

(Answers on the second page.)

Fact Family within 20 Worksheet #1

Fact Family within 20 Worksheet #2

Compose & Decompose Teen Numbers (eg. 18 = __ + 10)

Add 10 or Subtract 10 (eg. 19 - 10)

Add or Subtract within 20 (eg. 17 - 3)

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