This includes a 4x5 grid with 20 expressions and equations illustrating properties of real numbers.
There is a color-coded key at the top of the paper. Students use the key to color each square based on the property it illustrates.
Properties included: Commutative Property, Associative Property, Identity Property,
Zero Property of Multiplication, Multiplication Property of -1, Inverse Property
Most of my students finished within about 10-15 minutes when using notes, but you could challenge them to try it without notes.