fact family cards: add and subtract

+ - Add and Subtract
with Fact Family Cards

* How to use the cards
* Print the cards
* Games and activities

* How to use the fact family cards

Each card has three numbers on it. The number at the bottom is the sum of the two numbers above it. These three numbers are a fact family. This card shows four related facts:

3 + 5 = 8
5 + 3 = 8
8 - 3 = 5
8 - 5 = 3

You can cut and glue a "fact family house" to hide one number at a time.
Place a stack of fact family cards in the house, say the missing number on the card (see the examples below), then pull the card off the stack and go on to the next card. At any time, you can move the position of the house so that it is hiding a different side of the cards.
Click here or click on the photo to see a model of the fact family house which you can cut and glue.

You can say each missing number as part of an addition problem or a subtraction problem. Look at the examples below.

+ 5 = 8
What plus 5 is 8?
8 - 5 =
What is 8 - 5?

3 + = 8
3 plus what is 8?
8 - 3 =
What is 8 - 3?

3 + 5 =
3 plus 5 is what?
- 3 = 5
What - 3 = 5?
- 5 = 3
What - 5 = 3?

You can even place the house so that its roof hides the top two numbers, then say all the pairs of numbers which add up to the number you can see. You won't know which pair is hidden under the roof, but you can turn this into a guessing game. See the activities below.

3 + 5 = 8
2 + 6 = 8
1 + 7 = 8
5 + 3 = 8
6 + 2 = 8
7 + 1 = 8

4 + 4 = 8

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* print the + - cards
* make the fact family house
* + - games and activities
* x ÷ cards