2.1 I can create and use input-output rules to solve (addition, subtraction, multiplication,and division) problems and can record the inputs and outputs in a table. (4.2.1.1)

D.28 Multiplication input/output tables

D.29 Multiplication input/output tables: find the rule

2.2 I can write and interpret (read) number sentences that involve multiplication, division,

and unknowns (variables) to represent a real-world problem. (4.2.2.1)

G.1 Write variable expressions

G.2 Write variable expressions: word problems

G.5 Write variable equations to represent word problems

2.3 I can find the values for the unknowns that make a number sentence true. (4.2.2.2)