Uncategorized

Fact Triangles

Fact Triangle Worksheet

Check out the fact triangles worksheets on the first grade worksheet page.

Fact triangles do a couple of important things.  First, they reinforce a critical first grade objective: memorizing addition facts with sums up to 18.  But in addition they also start to reinforce in your first grader the inverse relationship between addition and subtraction.

Example:

4 + 5 = 9

5 + 4 = 9

9 – 4 = 5

9 – 5 = 4

You’ll find two types of fact triangles.  The first (pictured here) includes all three digits.  In the second type the student is provided with two numbers and has to use reasoning to figure out the third.

Have fun!

About C. Smith

Technology manager. Dad.

Discussion

No comments yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Free resource for parents and teachers

Math worksheets ... and more!

Worksheets on this site are free for non-commercial use in the home and in the classroom.

Enter your email address to follow this blog and receive notifications of new posts by email.

%d bloggers like this: