Note: You can also access these puzzles as a Number Pyramids Desmos Classroom Activity.
![](https://i0.wp.com/www.collectedny.org/wp-content/uploads/2020/02/NumberPyramids.png?fit=604%2C270)
These puzzles from Henri Piccioto (check out his web site) would be great as a warm-up or a lead-in to algebraic expressions and equations. Maybe connect this activity to practice from Tools of Algebra: Expressions, Equations, and Inequalities?
Can you figure out the missing numbers in this pyramid?
![](https://i0.wp.com/www.collectedny.org/wp-content/uploads/2020/02/NumberPyramids2.png?resize=392%2C237&ssl=1)