WorksheetsFact Families
Total questions: 10
Answer KeyFact Families
Total questions: 10
5 + 10 = 15
7
6 + 4
9 + 9 = 18
20
9 + 11
4
7
19 - 10 = 9
6 + 13

10 questions
1st - 1st Grade
Mathematics
Fact Families is a free Grade 1 mathematics worksheet that helps students connect addition and subtraction equations within related fact families. Across 10 multiple-choice questions, students identify equations that belong to a fact family, find missing addends and differences, complete related equations, and select addition equations with the same sum. The worksheet gives students repeated practice recognizing how the same numbers can represent related addition and subtraction facts, such as 9 + 10 = 19, 10 + 9 = 19, 19 − 9 = 10, and 19 − 10 = 9. It is useful for introducing fact-family relationships, reinforcing missing-number reasoning, or checking foundational fluency. This free printable worksheet includes a complete answer key for efficient review and grading.
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Worksheets
Answer Key5 + 10 = 15
7
6 + 4
9 + 9 = 18
20
9 + 11
4
7
19 - 10 = 9
6 + 13
This worksheet helps Grade 1 students recognize related addition and subtraction equations in a fact family. Its 10 multiple-choice items ask students to identify matching equations, find missing addends or differences, complete a fact family, and choose an addition equation with the same sum. These tasks build understanding that the same numbers can form multiple connected facts.
Introduce a set of related numbers, such as 9, 10, and 19, and have students build two addition and two subtraction equations before assigning the worksheet. As students work, ask them to explain why 9 + 10 and 10 + 9 have the same sum and how the subtraction equations use that sum. Use the missing-number items, such as 6 + ___ = 13 and 14 − ___ = 7, to connect fact families with inverse operations.
Students may choose an equation that uses some of the same numbers but does not belong to the fact family, such as selecting 19 + 10 instead of 19 − 10 = 9. They may also confuse the missing number with a number already shown, or treat a reversed addition equation as different rather than recognizing that 9 + 11 and 11 + 9 have the same sum. Ask students to check both the operation and the complete relationship among the three numbers.
On Wayground, you can use this worksheet as a printable PDF or assign it as a digital quiz containing the 10 multiple-choice questions. It includes a complete answer key, and printable submissions can be graded by scanning student work with the Wayground for Teachers app. The printable format also gives schools an option for reducing screen time while students practise fact-family relationships.
Use the worksheet’s Advanced Settings to create a version with medium or wide font spacing, a larger font size, or a dyslexia-friendly font so the equation choices are easier to scan. You can also translate the fact-family directions and multiple-choice items into another language. These adjustments apply to the worksheet file while preserving its missing-number and related-equation practice.
Wayground offers a broad collection of free printable worksheets and practice problems across subjects, including downloadable PDFs and answer keys to support essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.