Grade
PK

Guess My Rule: Rubber Ducks

Inside the circle: A group with 2 red duckies and 2 blue duckies. A group with 4 yellow duckies. A group with 3 red duckies and 1 blue ducky. Outside the circle: A group with 1 red ducky and 2 blue duckies. A group with 3 red duckies and 3 yellow duckies. a group with 4 yellow duckies and 1 blue ducky. A group with 1 red ducky and 1 blue ducky.
  1. Some groups of rubber ducks belong in the circle, and some do not. There is a rule to decide what belongs in the circle. What is the rule?
  2. Which rubber ducks belong inside of the circle? Circle them. How do you know?
Group 1 has 1 blue ducky. Group 2 has 2 yellow duckies and 2 blue duckies. Group 3 has 3 red duckies and 2 blue duckies. Group 4 has 1 yellow ducky and 3 red duckies.

3. Draw another set of rubber ducks that belong in the circle.

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Reference for Educators

Sample problems and solutions