This is aligned with the following California State Standards:
Combine two sets of objects to form a new set. Divide objects in a set into two or more subsets.
Represent addition or subtraction word problems or models with equations (e.g., representing 6 marbles plus 2 marbles equal 8 marbles as 6 + 2 = 8 marbles).
Represent expressions using variables and numbers (e.g., express subtract k from 12 as 12 - k). Recognize that the unknown quantity in an equation is represented using a symbol or letter (e.g., 5 + b = 8).
Represent a given real-world problem (e.g., Joe has 6 markers. Joe has some crayons. Joe has a total of 10 art supplies. How many crayons does Joe have?) with a mathematical equation (e.g., 6 + x = 10).
Solve real-world problems with non-negative rational numbers by representing the situation with a mathematical equation (e.g., Mark has 3.5 inches of string. Mark gets 1 more inch of string. Which equation shows how much string Mark has all together? 3.5 + 1 = x).