standard_description: Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
problem_activity: Problem 1
List something that has a volume of about 1 milliliter.
Problem 2
List something that has a volume of about 1 liter.
Problem 3
Does the object you listed in #1 have a volume that is more or less than the volume of the object you listed in #2? Why?


aligns: no