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 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.
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.
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.
Three numbers, four facts, one happy family
A fact family is a set of three numbers that make four related facts. With 3, 5 and 8, kids write 3 + 5 = 8, 5 + 3 = 8, 8 − 3 = 5, 8 − 5 = 3. Second graders use fact families to see that addition and subtraction are connected, and to solve problems with a missing number, like 6 + ? = 14. It's a big step toward knowing all their facts within 20 by heart. The click is when kids realize they can solve a subtraction fact by thinking of the addition fact they already know.
Fact families turn one fact into four. These moves help kids see the connection.
Draw a simple house with the three numbers in the roof and four windows below. Kids fill each window with a fact. The biggest number always lives at the top. The picture helps kids remember that the whole is made of two parts.
Why it works: pairing a picture with each word gives kids two ways to remember it, a well-tested principle of how people learn (Mayer, 2009).
Try it withFact Family WorksheetWorksheetsOpen it →Give each child 8 cubes in two colors, 3 red and 5 blue. They snap them together and say the addition facts, then break off the red to show 8 − 3 = 5. Building it shows exactly why all four facts are true.
Why it works: the U.S. Department of Education's guide for teaching elementary math recommends moving from hands-on objects to drawings to numbers.
Try it withSubtraction as an Unknown Addend ActivityActivitiesOpen it →When kids see 13 − 6, ask "What plus 6 makes 13?" Have them explain their thinking to a partner. Talking it through builds the habit of using addition facts to solve subtraction, which is faster and more reliable.
Why it works: when kids say the precise math words, their understanding gets sharper, a recommendation of the U.S. Department of Education's elementary math guide.
Try it withAdding and Subtracting Unknown Numbers ActivityActivitiesOpen it →Fact family fun for your mathematicians:
Teacher favorites right now: Fact Family Worksheet, Subtraction as an Unknown Addend Activity and Adding and Subtracting Unknown Numbers Activity.
A fact family is a group of three numbers that make two addition facts and two subtraction facts. For 2, 7 and 9: 2 + 7 = 9, 7 + 2 = 9, 9 − 2 = 7 and 9 − 7 = 2.
They show how addition and subtraction are connected. Once kids understand that, they can use a fact they know to solve one they don't.
Use objects like cubes to show the parts and the whole, then draw a fact family house. Practice a few families a day until it feels automatic.
Most do. When the two parts are the same, like 4, 4 and 8, the family only has two facts: 4 + 4 = 8 and 8 − 4 = 4.
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