Open Middle®
Directions: Fill in the boxes with any numbers that make the equation true.
Hint
What number is the easiest to fill out? What are the factors of 12?
Answer
There are many possibilities. Here are some: 2, 6, 5, and 8; 1, 12, 5, and 31
Source: Dane Ehlert
I love these! Looking for a whole set! Perfect square trinomials, diff of squares, etc. Do you have these or have an idea where I could find them? Thank you!