Grade
5

Mobile Math: One Green Circle

Look at the mobile below. What do you notice? What do you wonder? What do you know?

This mobile is balanced and has two main strings. The right side has a green circle, a purple hexagon, and a red square. The left side has a red square then branches into two more strings. These strings are balanced. The left side has 3 purple hexagons and the right side has two red squares. The shape values are unknown.

What is one set of possible values for the shapes?

If the value of the square is 412, what are the values of the other shapes? How do you know?

If none of the shapes has a value that is a whole number, what is a possible set of values for the shapes? How do you know?

Printable Version

Google doc for printing and copying

Reference for Educators

Sample problems and solutions