1. Please cut them out.
2. Put them in a baggie.
3. Keep them in a convenient place.
Each fact triangle is a fact family. The top of the triangle has a "dot". This represents the sum off the other two numbers. For example, a triangle with the number 3 and 7 are in the bottom two corners, it would have 10 at the top by the dot to represent the sum. When you cover up the top number, you can solve it by thinking 3+7= or 7+3= . If one of the corners is covered, you can solve it by thinking 10-7= or 10-3= . Another way to solve for one of the bottom corners is to find the unknown, 7+___=10 or 3+___=10.
Make this part of your regular routine for practicing math facts. Being able to recognize fact families builds FACT POWER!