This completing fact families worksheet gives 1st graders six number houses to fill in—writing two addition and two subtraction facts for each set of numbers. Answer key included for fast, no-prep math practice.

This 1.OA.4 common core worksheet gives 1st grade students three fact families and the four related addition and subtraction facts in each, plus an answer key, so subtraction starts to feel like addition read backwards.

This fact families worksheet has 1st graders write twelve column addition and subtraction facts from three number families within 20. An answer key is included for quick, no-prep checking.

This Thanksgiving fact families worksheet gives 1st grade students practice with addition and subtraction within 20. An answer key is included, so a holiday math review takes almost no prep.

This christmas math fact families worksheet gives 1st Grade students three number triangles and twelve facts to write. An answer key is included, so holiday fact practice needs no prep.

This St. Patrick's Day Fact Families Worksheet gives 1st grade students three triangles with a missing number and room to write all four related facts. An answer key is included, so it is ready to print and go.