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 fact family worksheet gives 2nd graders three number bonds and twelve addition and subtraction facts to write. An answer key is included, so it is ready for no-prep math practice.

This multiplication division fact families worksheet has 3rd graders write two multiplication and two division facts for four number families, plus a word problem. An answer key is included.

This subtraction as an unknown addend activity helps K through 2nd grade students solve subtraction within 20 by matching each fact to its addition fact card. Answer key included.

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 math graphic organizer worksheet helps 3rd graders map the three numbers of a fact family into all four multiplication and division sentences. Answer key included, so fact fluency practice takes no prep at all.

Find the missing number in equations within 20 with this adding and subtracting unknown numbers activity for 1st and 2nd grade: matching cards, a recording sheet and practice, answer key included.

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 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.

In this 1.OA.4 First Grade Common Core Lesson, students practice finding the missing added using subtraction as strategy to solve.

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 3.OA.7 Common Core Worksheet gives 3rd graders four fact families to complete plus a market word problem. An answer key is included, so multiplication and division fluency practice needs no prep.

In this 1.OA.1 First Grade Common Core Lesson, students find the missing addends in equations up to 20.

This subtraction with 6-7-8-9 differences activity is a snowy card sort for kindergarten and 1st grade students. Solve each fact, sort it under its snowflake, and check with the answer key included.

The Valentine's Day Fact Families Worksheet gives 2nd grade students three number triangles with a missing number and four facts to finish, building addition and subtraction fluency together. Answer key included.

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.

This subtraction with 2-3-4-5 differences activity is a winter card sort for kindergarten and 1st grade. Children solve facts within 10, sort each card under its snowflake, and check with the answer key included.

In this 1.OA.8 First Grade Common Core Lesson, students find the unknown whole number in addition equations up to 20.