In this activity, students will practice adding and subtracting fractions. They will create expressions to match given criteria (e.g., the greatest value, the least positive value, etc.). Students will reason abstractly and structurally, arguing that their expressions are the greatest or least possible.

Z Proportions
Becca Hirsbrunner photographed this fabulously constructed Z proportions letter. Interestingly, every element but the diagonal bar can be rationalized.