standard_description: Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
problem_activity: Task
Julius has 4 blue marbles.  If one third of Julius' marbles are blue,
how many marbles does Julius have?  Draw a diagram and explain.


aligns: no